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BeoVision Televisions Technical Sound Guide Bang & Olufsen A/S May 10, 2021 Please note that not all BeoVision models are equipped with all features and functions mentioned in this guide.
BeoVision TelevisionsTechnical Sound Guide
Bang & Olufsen A/SMay 10, 2021
Please note that not all BeoVision models are equipped withall features and functions mentioned in this guide.
Contents
1 Introduction 4
2 Menu Maps 5
3 Menu Items 73.1 Global controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.1 Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.2 Max Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.3 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.4 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.5 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.6 Eco Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1.7 Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.8 Sound Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.2 Sound Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.1 Frequency Tilt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.2 Sound Enhance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.2.3 Speech Enhance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.4 Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.2.5 Fader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.2.6 Listening Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.7 LFE Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.8 Loudness Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2.9 Spatial Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.9.1 Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.9.2 Surround . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.2.9.3 Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.9.4 Stage Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.9.5 Envelopment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.10 Dynamics Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.10.1 Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.10.2 Clip Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Speaker Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.1 Speaker Role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.2 Speaker Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.3 Speaker Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.4 Speaker Preset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.5 Assisted Speaker Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.6 Bass Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.6.1 Crossover Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.6.2 Enable Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.6.3 Panning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.6.4 Re-direction Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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3.3.6.5 Re-direction Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.3.7 LFE Input to Ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.8 Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.3.8.1 Time Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.8.2 Allpass Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4 Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 Sources menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Additional Information 18
Index 19
3
Introduction
Your Bang & Olufsen BeoVision television is equipped with an extremely powerful sound processing engine that can be customised tosuit almost any configuration or listener preference. Internally, the digital signal processing (the computer that decodes and managesthe audio signals coming into and out of your television) uses a proprietary 16.5-channel format that is compatible with an enormousvariety of loudspeaker configurations. In spite of its complexity, it is extremely simple to use compared to other high-end surroundsound processors, since almost all of the parameters are automatically configured when the television is “told” which Bang & Olufsenloudspeakers are connected to it. However, those parameters are all available in the menus to give experienced users the option ofcustomising the settings for different setups.
The controls within the menus for the sound processing are divided into four general areas:
Global Controls are day-to-day adjustments such as the volume control.
Sound Modes are pre-programmed adjustments to suit different types of program material, and are factory-set for materials such asDrama, Music, or Speech. These can also be customised to suit personal preferences.
Speaker Groups are adjustments to suit different listening positions or situations. For example, these can be configured to changebetween stereo and surround listening, between one listening position and another, or between individual or group listeningsituations.
Speaker Connections or Speaker Types are used to initially set up your loudspeakers. This is only used as a first-time setup, or whenadding new loudspeakers to your configuration.
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Menu Maps
Sound Sound Info Sound Modes Speaker Groups Volume Bass & Treble Loudness Eco Mode Speaker Connections
Sources Name Sound Mode Speaker Group Stand Position Audio Level BeoRemote One Lists
Sound Stand Sources Beolink Service
Sound ModesMovie Game Speech Drama Sports Music Night Listening Custom
Speaker Groups SetupStart-up Name ...
GameBass Management Frequency Tilt Sound Enhance Speech Enhance Balance & Fader (Listening Style) LFE Input Loudness Boost Spatial Control Dynamics Control Reset to Default
Spatial Control Balance & Fader Processing Surround Height Stage Width Envelopment
Dynamics Control Compression Clip Protection
Start-up Speaker Role Speaker Distance Speaker Level Speaker Preset (Assisted Speaker Calibration) Bass Management LFE Input to Ceiling Subwoofer
Bass Management Crossover Frequency Enable Filtering Panning Re-Direction Levels Re-Direction Balance
Subwoofer Time Alignment Allpass Frequency
Figure 2.1: Menu map for BeoVision Eclipse and BeoVision Harmony televisions. Note that the list of available features are almostidentical to those in Figure 2.3 – only the organisation of items is different. Menu items not related to sound have been shown in grey.Options marked with parentheses are dependent on the capabilities of the specific system and may not be available on a specificproduct or software version.
Sound Sound Info Sound Modes Speaker Groups Volume Bass & Treble Loudness Eco Mode Speaker Connections
Sound ModesAutomatic Movie Game Speech Drama Sports Music Night Listening Custom
Speaker Groups SetupStart-up Name ...
MovieBass Management Frequency Tilt Sound Enhance Speech Enhance Balance & Fader (Listening Style) LFE Input Loudness Boost Spatial Control Dynamics Control Reset to Default
Spatial Control Balance & Fader Processing Surround Height Stage Width Envelopment
Dynamics Control Compression Clip Protection
Start-up Speaker Role Speaker Distance Speaker Level Speaker Preset (Assisted Speaker Calibration) Bass Management LFE Input to Ceiling Subwoofer
Bass Management Crossover Frequency Enable Filtering Panning Re-Direction Levels Re-Direction Balance
Subwoofer Time Alignment Allpass Frequency
Figure 2.2: Menu map for BeoVision Horizon and BeoVision Avant NG. Note that the list of available features are almost identical tothose in Figure 2.3 – only the organisation of items is different. Options marked with parentheses are dependent on the capabilities ofthe specific system and may not be available on a specific product or software version.
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Sound Sound Adjustment Sound Modes Speaker Groups Speaker Connections Sound Info Reset to Default
Sound ModesAdaptive Movie Game Speech Drama Sports Music Custom Night Listening
Sound AdjustmentVolume Bass Treble Max Volume (Headphones) Eco Mode
Speaker Groups SetupTV Name Name ...
MovieFrequency Tilt Sound Enhance Speech Enhance Loudness Bass Management Balance L/R Fader B/F Dynamics Control (Listening Style) Advanced Settings Reset to Default
Movie:AdvancedLFE Input Loudness Spatial Control Dynamics Control
Loudness Bass Max Boost Treble Max Boost Reset to Default
Spatial Control Balance L/R Fader B/F Processing Surround Height Stage Width Envelopment Reset to Default
Dynamics Control Compression Clip Protection Reset to Default
TV Speaker Roles Speaker Distance Speaker Level Speaker Preset (Assisted Speaker Calibration) Setup Wizard Advanced Settings
Advanced Settings Bass Management LFE Input to Ceiling Subwoofer
Bass Management Crossover Frequency Enable Filtering Panning Re-Direction Levels Re-Direction Balance
Subwoofer Time Alignment Allpass Frequency
Figure 2.3: Menu map for BeoSystem 4, BeoPlay V1, BeoVision 11, and BeoVision Avant televisions. Note that the list of availablefeatures are almost identical to those in Figure 2.2 – only the organisation of items is different. Options marked with parentheses aredependent on the capabilities of the specific system and may not be available on a specific product or software version.
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Menu Items
3.1 Global controls
3.1.1 Volume
This menu displays the current volumesetting on a scale of 0 to 90 in 1 dBsteps.
3.1.2 Max Volume
The Max Volume is the highest volumesetting that is allowed in normal usage.This can be used to limit the maximumoutput of the television.
3.1.3 Bass
The Bass adjustment allows you tochange the relative amount oflow-frequency sound using a lowshelving filter with a turnoverfrequency of 120 Hz.
This is a global control, meaning thatthe setting of the Bass control isapplied to all Sound Modes andSpeaker Groups, and is independent ofthe settings of the Frequency Tilt andSound Enhance controls. The range ofthe controller is ±8 dB in steps of 0.8dB.
Figure 3.1: Frequency response mea-surements of all settings of the Basscontrol. Note that this response is ap-plied to each input channel.
3.1.4 Treble
The Treble adjustment allows you tochange the relative amount ofhigh-frequency sound using a high
shelving filter with a turnoverfrequency of 8 kHz.
This is a global control, meaning thatthe setting of the Treble control isapplied to all Sound Modes andSpeaker Groups, and is independent ofthe settings of the Frequency Tilt andSound Enhance controls. The range ofthe controller is ±8 dB in steps of 0.8dB.
102 103 104
Frequency (Hz)
-10
-8
-6
-4
-2
0
2
4
6
8
10
Gai
n (d
B)
Figure 3.2: Frequency response mea-surements of all settings of the Treblecontrol. Note that this response is ap-plied to each input channel.
3.1.5 Loudness
Sadly, human hearing is imperfect.One of the issues that we all sufferfrom is that our perception of thetimbre or ‘tone colour’ of a sound is notconstant with listening level. We areless sensitive to low frequencies whenthey are played at low listening levels.In other words, if you are listening tomusic at a high level and you turndown the volume, you will notice that,the lower the volume, the less bassyou can hear. This is also true of highfrequencies, albeit to a lesser extent.
The Loudness setting in your televisioncounteracts this effect. As you reducethe volume, the bass and treble levelsare automatically increased tocompensate for your reducedperception in the outer frequencybands.
If you do not wish this setting enabled,Loudness should be set to OFF.
Note that, in some BeoVision models,
the loudness boost toggle (whether itis on or off) is stored with the SoundMode, so different modes can havedifferent settings.
3.1.6 Eco Mode
When the Eco Mode is turned on, thenloudspeakers that are not currently inuse will be switched off automaticallyby the television. If Eco Mode is off,then all loudspeakers associated withthe current Speaker Group will beswitched on by the television.
Note that the behaviour of the EcoMode setting is also dependent on theinput signal. For example, if you have a7.1 loudspeaker configuration and theSpatial Processing is set to 1:1, theloudspeakers that are currentlyswitched on, are those that areassociated with the input channelassignments. So, if you are watchingtelevision, only two loudspeakers willbe on. If you then switch to a DVD,then the remaining three of your mainloudspeakers and your subwoofer willswitch on.
3.1.7 Headphones
Different brands and models ofheadphones produce different outputlevels for the same input depending ontheir ‘sensitivity’. The Headphonesmenu allows you to make adjustmentsfor this sensitivity.
For example, if you have headphoneswith a high sensitivity, then they willsound louder than your loudspeakersat the same volume setting. Thereforethe headphones value should beturned down to offset the headphoneoutput to a lower level, matching theloudspeakers’ output levels.
Note that not all Bang & Olufsentelevisions are equipped with aheadphone output. In the case whereyour device does not have this feature,this menu item will not be displayed.
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3.1.8 Sound Info
Select this menu item to displayinformation about the incoming andoutgoing audio signals, including theencoding type and the number ofaudio channels in the incoming stream.Also displayed are the current SoundMode and Speaker Group.
3.2 Sound Modes
As was described in the Introduction,the Sound Modes on the televisionallow you to have different audiosettings for different types of signals.For example, you may wish to have alarger sound stage and enhanced bassresponse while watching movies, but amore purist signal path when listeningto music. Sound Modes allow you tohave up to seven different presets forthese changes.
All Sound Modes have factory-defaultsettings that have been optimised formaterials such as Movies, Games,Speech (e.g. TV News), Drama (e.g.regular television programmes),Sports, and Music. In addition, theCustom sound mode in itsfactory-default setting is designed as apurist ‘direct mode’ music setting.
It is possible to customise the settingsof all Sound Modes. In addition, it ispossible to alter the name of theCustom sound mode.
If you save changes to any of theSound Modes used by the “Adaptive”or “Automatic” mode, then yourcustom settings are used instead ofthe factory settings.
Automatic
The Automatic mode is, in fact, not asound mode. Rather, it is anauto-selector that chooses the bestsound mode using metadata in thesignal stream (in the case of DVB) orfor a given source (i.e. Blu-ray player,PC, game console etc.).
Sound Modes available for selection bythe Automatic setting are: Movie,Game, Speech, Drama, Sports, Music.
Note that, on older BeoVisiontelevisions, this item is labelled“Adaptive”.
Movie
The Movie Sound Mode is designed foruse when watching movies, either fromlocal media (such as DVD or Blu-ray),streaming sources, or televisionbroadcasts.
Timbral settings are flat and bassmanagement is on. The True Imageprocessing is on and all of its controlsare set to the middle position.
Game
The Game Sound Mode is designed foruse for audio with game consoles.
The Frequency Tilt and Sound Enhancesettings give a slight bass and trebleenhancement and bass managementis on. The True Image processing is onand its controls are set to elevate theimage and give an increasedimpression of envelopment andsurround.
Speech
The Speech Sound Mode is designedfor signals where an increased speechintelligibility is desirable, for example,television news programmes.
The Speech Enhance setting isincreased, bass management andloudness are off, and spatial controlsare set to present a more narrow soundimage.
Drama
The Drama Sound Mode is designedprimarily for use when watchingtelevision broadcasts.
Timbral settings are at and bassmanagement is on. The True Imageprocessing is on and all of its controlsare set to the middle position. Dynamicrange compression is set to medium toreduce the volume changesencountered during advertising breaksin the broadcast.
Sports
The Sports Sound Mode is designed for
use when watching broadcasts ofsporting events.
The Frequency Tilt and Sound Enhancesettings are increased slightly and bassmanagement is on. The True Imageprocessing is on and its controls are setto increase the sensation of surroundand envelopment in the audio signal.
Dynamic Range compression is set tomedium.
Music
The Music Sound Mode is designed foruse for music sources, either with orwithout accompanying video.
Note that this mode is not designed asa ‘purist’ setting. However, it isintended to have a minimal effect onthe audio signals, while still up- ordown-mixing to all loudspeakers inyour current Speaker Group.
Note that the factory settings for theCustom mode can be used as a purist‘direct’ mode.
Night Listening
The Night Listening Sound Mode isdesigned for situations where it isdesirable to hear all components of theaudio signal without large jumps indynamics or bass. In this mode, thetelevision’s dynamic rangecompression is set to maximum andthe speech enhancement is increasedslightly.
Note that this setting may also beuseful in a “party” situation where it isdesirable to maintain a constant (butrelatively high) listening level.However, if this is the intention, itshould be modified to include the LFEchannel input (by setting LFE Input to“on”) and to set the Spatial Controls totheir middle settings.
Custom
The settings and the name of theCustom Sound Mode can be tailored toyour requirements and preference.
In its default settings, the intention ofthis mode is to deliver the samesignals that the artist and the
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recording and mastering engineersheard during the recording process.
All timbral settings are set to flat, thebass management is off, and theprocessing is set to 1:1.
3.2.1 Frequency Tilt
Frequency Tilt can be considered to bea combination of Bass and Treblesettings in a single parameter. WhenFrequency Tilt is set to a low value, thelow frequency content of your audiosignal is increased and the level of thehigh frequency content is reduced. Ifthe Frequency Tilt is set to a highvalue, then the opposite will be true.
The Frequency Tilt function will haveno effect on the audio signal at itsmiddle setting.
Note that Frequency Tilt can havedifferent settings for different SoundModes.
Figure 3.3: Frequency response mea-surements of all settings of the Fre-quency Tilt control. Note that this re-sponse is applied to each input channel.
3.2.2 Sound Enhance
The Sound Enhance setting is similar tothe Frequency Tilt setting in that itaffects the low and high frequencybands with a single slider. Increasingthe Sound Enhance value will increasethe level of the bass and treble bandswhile reducing the midrange.Decreasing the Sound Enhance valuewill have the opposite effect.
The Sound Enhance setting will haveno effect on the audio signal at itsmiddle setting.
Note that Sound Enhance can havedifferent settings for different SoundModes.
Figure 3.4: Frequency response mea-surements of all settings of the SoundEnhance control. Note that this re-sponse is applied to each input channel.
3.2.3 Speech Enhance
The Speech Enhance setting allowsyou to increase the intelligibility ofdialogue, making speech and voiceseasier to understand.
Note that the Speech Enhance settingwill have no effect on the audio signalwhen it is at its lowest setting.
3.2.4 Balance
The Balance setting can be used tore-direct input signals to differentoutput channels in your loudspeakerconfiguration. For example, setting theBalance all the way to the left on thedisplay will result in signals beingdirected only to the loudspeakers inyour configuration that have a SpeakerRole on the left (i.e. Left Front, LeftSurround, Left Front Height, etc.)
3.2.5 Fader
The Fader setting can be used tore-direct input signals to differentoutput channels in your loudspeakerconfiguration. For example, setting theFader all the way to the left on thedisplay will result in signals beingdirected only to the speakers in yourconfiguration that have a Speaker Rolein the rear (i.e. Left Surround, RightBack etc.) Note that, if you do not have
a surround configuration ofloudspeakers (i.e. if you have only aFront Left and Front Right loudspeakerin your current Speaker Group) thenthe Fader B/F setting will not operatecorrectly and should be set to themiddle position (the factory defaultsetting).
3.2.6 Listening Style
Note that the Listening Styleparameter is not available on allmodels and software versions.
The television has the option ofmodifying the audio signal dependingon your listening style. If your primaryactivity is listening to the audio signal(either with or without video), forexample, if you are sitting andlistening to music or watching a movie,then you should set this setting toActive However, if listening to theaudio signal is a secondary activity, asin the case of background music duringa party or dinner, then this option canbe set to Passive.
Traditionally, audio systems and mostrecordings are designed for ‘active’listening, with the assumption that thelistener and loudspeakers arepositioned correctly, and that theprimary activity of the user is to listento the audio signal. In this situation,each loudspeaker produces its owndedicated signal (for example, the leftfront input channel is produced by theleft front loudspeaker). This results inthe optimal reproduction of the spatialcharacteristics of the recording (forexample, the image locations of theinstruments and voices in the soundstage).
However, in cases where the listener isnot positioned correctly and the audiois used as environmental orbackground sound, it may be noticedthat instruments’ locations will moveinto the loudspeaker that is closest tothe listener. In this case, it may bepreferable to re-distribute audio signalsto different loudspeakers using the’Passive’ setting to reduce this effect.
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3.2.7 LFE Input
Almost all music produced formultichannel playback is recorded in5.0 or 7.0, without an LFE channel.This is primarily because the LFEchannel is intended for Low FrequencyEffects as the name implies, and thereare no such effects in music.
Frequently, however, you will noticethat in multichannel music releases,whether on DVD-Audio, SACD orBlu-ray discs, there is a signal on theLFE channel. This is, in almost allcases, generated in thepost-production process at themastering studio using a system verysimilar to bass-management. In fact,the only real differences are (1) thatthe low frequencies are not removedfrom the main channels, and (2) thatthe bass extraction is tuned by amastering engineer instead of using anautomated process. There are somerecord labels who (correctly) choose tonot put any information in the LFEchannel. Other labels use the LFEchannel for alternative purposes (seethe ‘LFE Input to Ceiling’ option).
Consequently, when listening tomultichannel music-only materials, it isrecommendable that the LFE input tothe television be turned off to ensurethat extra unwanted audio does notbleed into your system. Note that it isnot adequate to switch off yoursystem’s subwoofer to achieve thiseffect, since (unless programmed to dootherwise) the television’s bassre-direction may re-route the LFEchannel to the smaller loudspeakers.
Options: ON / OFF.
3.2.8 Loudness Boost
The Loudness setting of the televisionincreases the level of the high- andlow-frequency content when thevolume is decreased. The maximumamount of increase in level applied tothe bass frequency bands can be setby the user with the Treble Max andBass Max boost setting. This shows, indB, the amount of boost applied in the
low frequency bands at the lowestvolume levels.
Range: 0 dB to 12 dB.Step size: 1 dB.
10 100 1,000 10,000
0
2
4
6
8
10
12
Frequency (Hz)
Gain
(dB)
Figure 3.5: An example of the effectof the Loudness on the frequency re-sponse of the system at different vol-ume settings. The lowest curve is for ahigh volume setting. The highest curverepresents the response at a low vol-ume setting. In this example, the BassMax Boost is set to 12 dB and the TrebleMax Boost is set to 9 dB.
3.2.9 Spatial Control
Processing
There are many cases where thenumber of input channels in the audiosignal does not match the number ofloudspeakers in your configuration. Forexample, you may have twoloudspeakers, but the input signal isfrom a multichannel source such as a5.1-channel DVD or a 7.1-channelBlu-ray. In this case, the audio must be‘downmixed’ to your two loudspeakersif you are to hear all components of theaudio signal. Conversely, you mayhave a full surround sound system with7 main loudspeakers and a subwoofer(a 7.1-channel system) and you wouldlike to re-distribute the two channelsfrom a CD to all of your loudspeakers.In this example, the signal must be‘upmixed’ to all loudspeakers.
Bang & Olufsen’s True Image is aprocessor that accomplishes both ofthese tasks dynamically, downmixingor upmixing any incoming signal sothat all components and aspects of theoriginal recording are played using allof your loudspeakers.
Of course, using the True Imageprocessor means that signals in the
original recording are re-distributed.For example, in an upmixing situation,portions in the original Left Front signalfrom the source will be sent to anumber of loudspeakers in yoursystem instead of just one left frontloudspeaker. If you wish to have adirect connection between input andoutput channels, then the Processingshould be set to ‘1:1’, thus disablingthe True Image processing.
Note that, in 1:1 mode, there may beinstances where some input channelswill not be heard. For example, if youhave two loudspeakers but a multiâĂŞchannel input, only two input channelswill be audible. These channels aredependent on the speaker rolesselected for the two loudspeakers. (Forexample, if your loudspeakers’ rolesare Left Front and Right Front, thenonly the Left Front and Right Frontchannels from the multichannel sourcewill be heard.)
Similarly, in 1:1 mode, if you have amultichannel configuration but atwo-channel stereo input, then only theLeft Front and Right Front loudspeakerswill produce the sound âĂŞ all otherloudspeakers will be silent.
If True Image is on and if the number ofinput channels and their channelassignments matches the speakerroles, and if all Spatial Control slidersare set to the middle position, then theTrue Image processing is bypassed. Forexample, if you have a 5.1 loudspeakersystem with 5 main loudspeakers (LeftFront, Right Front, Centre Front, LeftSurround, and Right Surround) and asubwoofer, and the Spatial Controlsliders are in the middle positions, thena 5.1 audio signal (from a DVD, forexample) will pass through unaffected.
However, if the input is changed to a2.0 source (i.e. a CD) then the TrueImage processor will upmix the signalto the 5.1 outputs.
In the case where you wish to have thebenefits of downmixing without thespatial expansion provided byupmixing, you can choose to use theDownmix setting in this menu. Forexample, if you have a 5.1-channel
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loudspeaker configuration and youwish to downmix 6.1- and 7.1-channelsources (thus ensuring that you areable to hear all input channels) butthat 2-channel stereo sources areplayed through only two loudspeakers,then this option should be selected.Note, however, that the four advancedSpatial Controls (Surround, Height,Stage Width and Envelopment) will bedisabled in the Downmix processingmode. Also note that, in Downmixmode, there are two exceptions whereupmixing may be applied to the signal.The first of these is when you have a2.0-channel loudspeaker configurationand a 1-channel monophonic input. Inthis case, the centre front signal will bedistributed to the Left Front and RightFront loudspeakers. The second case iswhen you have a 6.1 input and a 7.1loudspeaker configuration. In this case,the Centre Back signal will bedistributed to the Left Back and RightBack loudspeakers.
Options: 1:1 / Downmix / True Image.
Surround
The Surround setting allows you todetermine the relative levels of thesound stage (in the front) and thesurround information from the TrueImage processor.
Note that changes in the Surroundsetting will have no effect on the signalwhen the Processing is set to 1:1 orDownmix.
Height
This setting determines the level of thesignals sent to all loudspeakers in yourconfiguration with a ‘height’ SpeakerRole. It will have no effect on otherloudspeakers in your system.
If the setting is set to minimum, thenno signal will be sent to the ‘height’loudspeakers.
Note that, if the LFE Input to Ceilingsetting is ON, then the Height settingwill determine the level of the ceilingloudspeaker. In this case, to ensure
that the ceiling loudspeaker iscalibrated to the correct level, theHeight setting should be set tomaximum.
See also ‘LFE Input to Ceiling’.
Stage Width
The Stage Width setting can be used todetermine the width of the frontimages in the sound stage. At aminimum setting, the images willcollapse to the centre of the frontalimage. At a maximum setting, imageswill be pushed to the sides of the frontsound stage. This allows you to controlthe perceived width of the band ormusic ensemble without affecting theinformation in the surround and backloudspeakers.
If you have three front loudspeakers(Left Front, Right Front and CentreFront), the setting of the Stage Widthcan be customised according to yourtypical listening position. If younormally sit in the ‘sweet spot’, atroughly the same distance from allthree loudspeakers, then you shouldincrease the Stage Width settingsomewhat. since it is unnecessary touse the centre front loudspeaker tohelp to pull phantom images towardsthe centre of the sound stage. Thefurther to either side of the sweet spotthat you are seated, the more reducingthe Stage Width value will improve thecentre image location.
Note that changes in the Stage Widthsetting will have no effect on the signalwhen the Processing is set to 1:1 orDownmix.
Envelopment
The Envelopment setting allows you toset the desired amount of perceivedwidth or spaciousness from yoursurround and back loudspeakers. At itsminimum setting, the surroundinformation will appear to collapse to acentre back phantom location. At itsmaximum setting, the surroundinformation will appear to be very wide.
Note that this setting has no effect onthe front loudspeaker channels.Changes in the Envelopment settingwill have no effect on the signal whenthe Processing is set to 1:1 orDownmix.
3.2.10 Dynamics Control
The Dynamics Control can be used toreduce the dynamic range of audiosignals. This will reduce the differencein level between the quietest andloudest portions of the music âĂŞ- inother words, it makes quiet soundslouder and loud sounds quieter.Consequently, it is designed primarilyfor a ‘night listening’ situation where itis desirable to reduce peaks in thesignal to avoid waking familymembers, while still allowing you tohear the quieter moments in the musicor movie. This setting can also be usedfor a ‘party’ setting where it isdesirable to play music at a moreconstantly loud level.
Note that, on older BeoVisiontelevisions, if the Dynamics Control isset to OFF in the advanced settings,then turning the Dynamics Control ONin the menu will have no effect on thesignal. Similarly, if, in the advancedsettings, the Compression is set toMedium or Maximum, but theDynamics Control in the basic menu isturned off, then no dynamic rangecontrol will be applied to the audiosignals.
Compression
There are many instances where it isdesirable to reduce the dynamic rangeof the audio signal. For example,television advertisements are typicallymuch louder than the programme theyinterrupt, and should be tamed. Filmson DVD or Blu-ray often have largedifferences between the quietest andloudest moments, making it difficult towatch movies late at night withoutdisturbing the rest of the family. At aparty, the music should be kept at aconstant level.
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Consequently, the television has theability to reduce (or compress) thedynamic range of audio signals bymaking quiet passages louder and loudpassages quieter. The amount ofcompression applied to the audiosignal for the current Sound Mode isdetermined using the Compressionsetting in the advanced settings of theDynamics Control.
Note that, in the older televisionmodels, the Dynamics Control must beturned ON in the basic menus in orderfor the Dynamics Control advancedsettings to have an effect.
Options: OFF / MEDIUM / MAXIMUM.
Clip Protection
Each of the television’s audio signalpaths has a customised soft clipfunction protecting its outputs toensure that the loudspeakers’ signalsare not hard-clipped (and thus audiblydistorted) at high listening levels. The‘price’ of this protection is that outputsignals approaching the upper limits ofthe digital-to-analogue converter (DAC)are increasingly modified with higherlevels.
This soft clip function has a thresholdof âĂŞ3 dB FS. Signals with a peaklevel lower than this will be unaffected.
It is possible to disable this protectionby setting the Clip Protection to OFF,which will allow high-level signals topass, unmodified to the DAC.
Note that, if Clip Protection is set toOFF, then there may be cases,depending on your input signal,settings, and volume level, where oneor more output signals will be clippedand distortion will be generated by thesystem. The audibility of this problemis dependent on the exact conditions,and is thus unpredictable.Consequently, it is highlyrecommended that, unless you arecertain of your intentions, you shouldhave Clip Protection set to ON at alltimes.
Options: ON / OFF.
3.3 Speaker Groups
A Speaker Group is a configuration ofloudspeakers that determine whichspeakers are playing, what audiochannels they are assigned to, andtheir calibration levels and delays for agiven listening position.
It is possible to assign up to 20 or 30different Speaker Groups on thetelevision (depending on the televisionmodel). On the older televisions, 9Speaker Groups are initially displayed:moving the cursor to the ninth SpeakerGroup reveals a “show all” optionwhich can be used to display theremaining available Speaker Groups.
3.3.1 Speaker Role
This menu allows you to enable theloudspeakers that are used in thecurrent Speaker Group. In addition, youcan set the desired channel allocationfor each loudspeaker (or Power Linkoutput channel).
When configuring a 5.1-channelsurround system, note that the rearloudspeakers should be set as LeftSurround and Right Surround (not LeftBack and Right Back).
Note that there are no restrictions onhow many copies of a given speakerrole that may be distributed in aSpeaker Group. For example, if youhave 10 loudspeakers connected to thetelevision, it is allowed (althoughperhaps not advisable...) to have 10Left Surrounds and nothing else.
Two of the Speaker Roles are nottraditional speaker roles: these are theMix Left and Mix Right options. Theseare outputs from a two-channel‘downmix’ of the input signal, and areintended for users wishing to send asignal to a second room or to a pair ofheadphones connected to a Power Linkoutput. If your input signal is from atwo-channel stereo source, then theMix Left and Mix Right outputs willmatch the Left and Right inputsrespectively. However, if you have a5.1 or 7.1 input from a DVD or Blu-ray
disc, then these channels will becombined into the two-channel Mix Leftand Mix Right output. Note that thisdownmixing algorithm is the same onethat is used for the television’sheadphone output.
If you have only two loudspeakers inyour main configuration, it isrecommendable that you assign theLeft Front and Right Front (instead ofthe Mix Left and Mix Right) roles tothose loudspeakers and allow the TrueImage processing to do the automaticdownmixing.
The positions corresponding to thevarious Speaker Roles are shown inFigures 4.4 and 4.5.
Options: Centre Front / Left Front /Right Front / Left Wide / Right Wide /Left Surround / Right Surround / LeftBack Right Back / Centre Back / CentreHeight / Left Height / Right Height / LeftSurround Height / Right SurroundHeight / Ceiling / Sub / Sub Front / SubRear / Sub Left / Sub Right / Mix Left /Mix Right.
3.3.2 Speaker Distance
This setting is used to ensure that thetimes of arrival of the loudspeakers’signals at the listening position arematched, despite them being placed atdifferent distances from the listeningposition. The value displayed on themenu should be the distance from thelistening position to each loudspeaker.The result of this alignment is that allloudspeakers’ signals are individuallydelayed to match the time of arrival ofthe sound from the most distantloudspeaker.
Note that, since the Listening Positioncan be different for different SpeakerGroups, these distances may notnecessarily be the same from SpeakerGroup to Speaker Group. In addition,the small differences in latencybetween various Bang & Olufsenloudspeakers, connected eitherwirelessly or with Power Link cables,are automatically compensated forinternally in the system.
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3.3.3 Speaker Level
The Speaker Level setting is used toalign the perceived or measuredloudness of the loudspeakers at thelistening position. Although Bang &Olufsen loudspeakers are allfactory-calibrated to give the sameoutput level, different loudspeaker (orlistener) placements and differentroom conditions have an effect on thespeaker level at the listening position.As a result, you will most likely requiresome adjustments to optimise yoursystem. In order to achieve the optimalsettings for the Speaker Levels, it ishighly recommended that you use asound pressure level meter. This caneither be an app on a smart phone or(preferably) a dedicated unit. Notethat, if you are considering purchasinga sound pressure level meter for thispurpose, a low-priced device (less than$100) will produce acceptable results.
The calibration procedure is as follows:
1. Ensure that the correct speakertypes have already been enteredfor each loudspeaker in yoursystem.
2. Set the sound pressure levelmeter to a ‘C’ weighting and‘Slow’ setting. It should beplaced near the listening positionwith the microphone pointedtowards the ceiling.
3. Select a loudspeaker from themenu. You should hear a noisesignal coming from theloudspeaker you selected.
4. Set the volume (not the SpeakerLevel) so that the reading on thesound pressure level meter is 65dB SPL.
5. Select a different loudspeakerfrom the menu and set itsSpeaker Level so that it alsoproduces a reading of 65 dB SPLat the listening position.
6. Continue this process for allloudspeakers. Note thatsubwoofers should also give the
same reading when the SPLmeter is set to a ‘C’ weighting.
If you have more than one loudspeakerassigned to a single output channel (forexample, if you have two Left Surroundloudspeakers) you should calibrate thetwo loudspeakers using the samemethod as all other loudspeakers. Thetelevision automatically compensatesthe speaker levels for the fact thatmore than one speaker is used for thesame channel. This compensation isnot shown on-screen.
If you have a mono centreloudspeakers (for example, a BeoLab7-4 or a BeoLab 10) you will be askedto calibrate its speaker level twice âĂŞonce for each Power Link channel towhich it is connected.
It should be stated that it is notunusual for Speaker Level differencesto be required in a given configuration.This can be due to aspects of thesystem such as loudspeaker distancesfrom the listening position andplacement in the listening room.
3.3.4 Speaker Preset
Some Bang & Olufsen loudspeakerssuch as the BeoLab 90 haveuser-programmable “Presets” that canbe used to customise specificcharacteristics such as Beam Width orBeam Direction. It is possible toassociate a given preset in theloudspeaker with a Speaker Group inthe BeoVision television using the“Speaker Preset” number.
Any Speaker Preset can be associatedwith any Speaker Group – in otherwords, it is not necessary that the twonumbers match each other.
Note that the television can onlytransmit one Speaker Preset value toall Power Link and Wireless Power Linkoutputs. Consequently, in cases wherethere are multiple pairs ofloudspeakers (e.g. four BeoLab 90’s)connected to the television, theparameters within the loudspeakers’presets should be carefully selected tomatch each other.
If the Speaker Preset value in thetelevision is set to “0”, then no presetvalue will be transmitted to theloudspeakers.
It should also be noted that there aresome parameters in the loudspeaker(e.g. Latency Mode) that areautomatically overridden by theBeoVision television in order to ensureproper integration with otherloudspeakers in the configuration.
3.3.5 Assisted SpeakerCalibration
Some televisions in the Bang & Olufsenportfolio give you the option to use anexternal microphone to automate theloudspeaker calibration process. Thisprocedure works by sendingmeasurement signals out of eachloudspeaker that has been enabled forthe Speaker Group and measuring theirresponses at the listening position.
The assisted calibration process isstarted from this menu item. You willbe guided through the process byon-screen instructions.
Note that only the Speaker Distancesand Speaker Levels are adjusted by theAssisted Speaker Calibration process.The resulting values are entered intothe respective menus, and can bemanually adjusted afterwards if youwish to do so.
3.3.6 Bass Management
In a perfect sound system, allloudspeakers are identical, and theyare all full-range. However, most often,this is not an option. Luckily, it ispossible to play some tricks to avoidhaving to install a large-scale soundsystem to listen to music or watchmovies.
Humans have an amazing ability tolocalise sound sources. With your eyesclosed, you are able to point towardsthe direction sounds are coming fromwith an incredible accuracy. However,this ability gets increasingly worse aswe go lower in frequency, particularly
13
in closed rooms.
In a sound system, we can use thisinability to our advantage. Since youare unable to localise the point oforigin of very low frequencies, it shouldnot matter where the loudspeakerthat’s producing them is positioned inyour listening room. Consequently, weare able to remove the bass from our‘main’ loudspeakers and send them to
a single large loudspeaker that canproduce the bass for the entire system.This loudspeaker is called a‘subwoofer’ since it is used to producefrequency bands below those playedby the woofers in the mainloudspeakers. The process of removingthe bass from the main channels andre-routing them to the subwoofer iscalled ‘bass management’.
Note that, although a bassmanagement system requires at leastone loudspeaker with low frequencycapabilities such as a subwoofer, itshould not be confused with an LFE ora ‘.1’ channel. However, in most cases,the LFE channel from your media (i.e.DVD or Blu-ray) will be combined withthe low-frequency output of the bassmanagement system and the totalresult routed to the subwoofer.
BalancePanning
+
Level
LFE
1
LFE
2
LFE
1
LFE
2
Bass Management Bass Redirection
Balance Level
LFE
Speaker
Subwoofer
Speaker
BalancePanning
+
Level
SpeakerSpeaker
Balance Level Subwoofer
EnableFiltering
EnableFiltering
EnableFiltering
EnableFiltering
Figure 3.6: Block diagram of the Bass Management and Bass Re-direction processing in the television.
The television has a logic tableincluded in its Bass Management andRe-direction section that makesintelligent decisions regarding therouting of bass to the variousloudspeakers. When the loudspeakersin the current Speaker Group havebeen chosen, the settings for the BassManagement and the Bass Re-directionare automatically entered into theAdvanced menus by the system. Thesesettings are based on measurementsof the bass capabilities of allloudspeakers in the Bang & Olufsenportfolio. Consequently, the bass andLFE information will be directed to theloudspeakers in your system with the
greatest potential to deliverlow-frequency information. Theseautomatic settings can be overriddensimply by entering new values in theadvanced settings for the BassManagement and Bass Re-direction.
It is possible to turn the BassManagement on or off for a givenSound Mode. When the BassManagement is ON, the low frequencycontent in your audio signal may bere-routed to different loudspeakers,depending on their capabilities.
For example, if you have two smallloudspeakers and a subwoofer, and
Bass Management is on, then the lowfrequency signals will be directed toyour subwoofer instead of to yoursmaller main loudspeakers. If BassManagement is OFF, thenlow-frequency content in your mainaudio channels will not be re-directedto larger loudspeakers in your system.Note, however, that this will not haveany effect on the routing of the LFEchannel to the subwoofer(s) or thelarger speakers.
Turning Bass Management on will notmerely re-direct low-frequency contentfrom the main audio channels tosubwoofers in your system. It will
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re-direct low frequencies to the mostcapable loudspeakers in your currentconfiguration (or Speaker Group). Forexample, if you have full-rangeloudspeakers (such as BeoLab 90’s) foryour Left Front and Right Frontchannels, and smaller loudspeakers(such as BeoLab 17’s) as the surroundloudspeakers, then the low frequencycomponents of the surround channelswill be re-directed to the frontloudspeakers, since the BeoLab 90’shave a higher capacity to play lowfrequencies louder than the BeoLab17’s.
There are cases where bass will bere-directed to a full-range loudspeakerinstead of to a subwoofer in yoursystem. This is because somefull-range Bang & Olufsenloudspeakers have a greater capabilityto play low-frequency materials thanmost subwoofers. For example, if youhave a system that includes twoBeoLab 20’s and a BeoLab 19subwoofer, all bass (whether from themain input channels or the LFE input)will be directed to the BeoLab 20’s. Inother words, the BeoLab 19 will receiveno signals. This is because a singleBeoLab 20 is capable of playing louderthan a BeoLab 19 in mostlow-frequency bands. Consequently,routing low frequencies to your BeoLab19 will be equivalent to downgradingyour loudspeaker system. If you wishto do so, this can be overridden usingthe advanced settings of the BassManagement and Bass Re-direction.
Crossover Frequency
The crossover used in the BassManagement system is a 4th-orderLinkwitz-Riley type. All output signalsuse the same crossover frequency toensure that coherent signals onmultiple output channels havematched phase responses whenpassed through the Bass Managementand Bass Re-direction processing.
Range: Bypass, 20 Hz to 300 Hz.Step size: 1 Hz.
10 100 1,000 10,000−80
−70
−60
−50
−40
−30
−20
−10
0
Frequency (Hz)
Mag
nitu
de (d
B)
Bass Management − Magnitude Responses
Figure 3.7: Magnitude response of thecrossover used in the Bass Managementsystem, showing an example with de-fault frequency of 120 Hz.
Enable Filtering
The Enable Filtering setting for eachloudspeaker in your configurationallows you to determine whether or notthe low frequency components of itssignal should be re-routed to the twoBass Management low-frequencychannels.
When this parameter is set to ON for agiven loudspeaker, this means that itslow frequency content will bere-directed to another loudspeaker inthe Speaker Group.
Note that turning Enable Filtering toOFF will not disable the potential ofre-routing the two Bass Managementlow-frequency channels back to agiven loudspeaker using BassRe-direction, as can be seen in theblock diagram in Figure 3.6.
If you wish to disable the entire bassmanagement processing, this shouldbe done using the Bass ManagementON/OFF parameter in the basic settingsfor the current Sound Mode.
Note that initial settings of this menuare automatically chosen based oninformation from the SpeakerConnections menu.
Panning
Selecting this menu brings you to themenu where you adjust the left/rightpanning of the Bass Managementsignal derived from each outputchannel into the two Bass Management
low-frequency channels.
The Panning setting allows you todetermine the relative distribution ofthe low frequency components from agiven audio signal to the two BassManagement low-frequency channels.
If the Bass Management EnableFiltering for a given loudspeaker is setto OFF, then the Bass ManagementPanning for that output channel isirrelevant.
Setting this parameter to the centrewill result in equal levels being directedto the internal left and right LFEchannels. Negative values result in thesignal being panned to the leftlow-frequency channel. Positive valuespan to the right.
Initial settings of this menu areautomatically chosen based oninformation from the Speaker Roles forthe current Speaker Group.
Re-direction Levels
Selecting this item brings you to themenu where you adjust the level of thetwo Bass Management low-frequencychannels being added back to theindividual output channels.
It is possible in the television to useany loudspeaker to reproduce the LFEchannel and low-frequency contentfrom the bass management system.This is done using the Bass Redirection.Typically, in a bass-managed 5.1 or 7.1system, the LFE and the bassmanagement output will be directed toa single subwoofer. However, if youdesire, it is possible to send thatinformation to any loudspeakers in thecurrent Speaker Group by increasingthe Redirection Levels.
Note that initial settings in this menuare automatically chosen based oninformation from the SpeakerConnections menu and the SpeakerRoles for the current Speaker Group.
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Re-direction Balance
As described above, the bassmanagement system in the televisionproduces two channels oflow-frequency content. The BassRedirection Balance is used to controlthe relative level of each of these twochannels in the signal sent to eachloudspeaker. Typically, if you are usinga single subwoofer, then the Balancewill be set to the middle position (0),ensuring that both low-frequencychannels are present in the subwoofer.However, if you have two subwoofersand they are set to have Speaker Rolesof Sub Left and Sub Right, then the leftsubwoofer will have a RedirectionBalance set to LEFT (-1) and the rightsubwoofer to RIGHT (1). This willensure that the stereo informationfrom the bass management output ismaintained as a stereo signal in thelistening room.
Note that initial settings of this menuare automatically chosen based oninformation from the Speaker Roles forthe current Speaker Group.
3.3.7 LFE Input to Ceiling
Five-channel recordings for musicwithout accompanying video arealmost always produced in 5.0. Inother words, there is no need for anLFE channel, since most music doesnot contain low frequency effects suchas explosions or dinosaur footsteps (infact, some record labels do not includeany signal on the LFE channel on theirmultichannel releases).
Some formats, such as SACD,DVD-Audio and Blu-ray discs, do notlimit the content of the LFE channel tolow-frequency information only.
As a result of these two facts, somerecord labels use the LFE channel ontheir discs for height informationinstead of low frequency effects. Thismeans that the LFE input channelshould be directed to a ‘full range’loudspeaker placed above thelistener.* This can be accomplished inthe television by setting the LFE Input
to Ceiling parameter to ON. This willdirect the audio signal on the LFE inputto a loudspeaker with a ‘Ceiling’Speaker Role. Range: ON / OFF.
*Consult the liner notes for your disc(s)for correct loudspeaker placement ofthe ceiling speaker.
3.3.8 Subwoofer
Selecting this menu moves you to theadvanced settings for the subwooferoutput.
Note that, if you have more than onesubwoofer, the parameters in thismenu are applied to all subwooferoutputs.
Time Alignment
The Time Alignment setting allows youto adjust the relative delays of thesubwoofer(s) and the mainloudspeaker channels. When this valueis positive, then the subwoofer isdelayed relative to the mainloudspeaker channels. When the valueis negative, then the subwoofer outputprecedes the main loudspeakerchannels by the displayed value.
This may be useful, for example, whena wireless subwoofer is used and it isnecessary to delay all mainloudspeakers in the Speaker Group towait for the transmission time of thewireless connection to the subwoofer.
Note that the small differences inlatency between various Bang &Olufsen loudspeakers, connectedeither wirelessly or with Power Linkcables, are automatically compensatedfor internally in the system.
Range: -30 ms to 30 ms.Step size: 1 ms.
Allpass Frequency
There is a first-order allpass filter in thesignal path of the subwoofer output.This can be adjusted to better matchthe subwoofer to the mainloudspeakers in cases where either the
placement or the phase responses ofthe loudspeakers result in poormatching of the upper- andlower-frequency components throughthe crossover band. Since this is afirst-order allpass filter, its output is90◦ out-of phase with its input at thecentre frequency displayed on-screen,and approaches 180◦ out-of phase atits maximum phase deviation (at 10times the filter’s centre frequency).
Range: Bypass, 20 Hz to 300 Hz.Step Size: 1 Hz.
10 100 1,000 10,000−200
−180
−160
−140
−120
−100
−80
−60
−40
−20
0
Frequency (Hz)
Phas
e (D
egre
es)
Subwoofer Allpass − Phase Responses
Figure 3.8: Phase response correspond-ing to three values for the Allpass Fre-quency setting, 20 Hz, 80 Hz, and 300Hz.
3.4 Speaker Connection
This menu is used to indicate the typeor model of loudspeaker connected toeach output of the television. Allcurrent Bang & Olufsen loudspeakersare listed in this menu, including somediscontinued models such as theBeoLab 1 and BeoLab Pentaloudspeakers.
Two additional options are included inthis list.
• ’Other’ is used to indicate aloudspeaker that is not includedin the list of Bang & Olufsenloudspeakers, for example, aloudspeaker from a differentmanufacturer. Note that, in thiscase, the output will bevolume-regulated.
• ’Line’ is used to indicate that theoutput signal is destined for theline input of another amplifierwith its own volume control (for
16
example, in a second listeningroom). Note that the output levelof the Power Link output, when ina ‘Line’ speaker role, is notvolume-regulated. Its outputlevel is calibrated to correspondto a -10 dBV consumer line levelwith a 2 V rms maximum output,and thus is compatible withconsumer-level audio-videodevices with a line input.
WARNING! If you have a BeoLabloudspeaker connected to a Power Linkoutput and you set the Speaker Rolefor that output to ‘Line’, the resultingoutput will not be volume regulatedand therefore may produce very loudoutputs! Use this Speaker Role withcaution.
Note that the television automaticallyenters settings in other menus (forexample, Bass Management advancedsettings) based on the information
entered in this menu.
On some software versions, this menuis labelled “Speaker Types” instead.
Note that BeoLab loudspeakersconnected using Wireless Power Linkwill have the speaker typeautomatically set by the system. Thiscannot be overridden by the usermenus.
Options: BeoLab / BeoVox / Line / Other/ None.
3.5 Sources menu
The Sources menu in the BeoVisionEclipse and BeoVision Harmony giveyou the option of setting the defaultSound Mode and Speaker Group foreach source (e.g. Live TV, HDMI 1,etc.). This is also true in all BeoVisiontelevisions described in this document.
However, the BeoVision Eclipse andthe BeoVision Harmony have an extrafeature that some users may finduseful. This is the Audio Leveladjustment, which gives you theopportunity to offset the gain of theaudio signal by source. For example,most movies are mastered to a levelwhere the dialogue is 31 dB below fullscale (the maximum possible digitallevel in an LPCM delivery system).However, it is not unusual for modernpop music to be mastered to a levelclose to full scale. This means that youmay notice a significant jump in theaudio of your television when switchingfrom a watching a film to listening tomusic. However, the actual differencebetween sources will vary fromcustomer to customer and betweendifferent types of program material.Consequently, the Audio Levelsadjustment gives you the possibility ofreducing the differences between yoursources accordingly.
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Additional Information
0º30º
100º
120º
0º30º
110º
90º
135º150º
Centre Front
Centre Front
Right Front
Right Front
Right Surround
Right Surround
0º
180º
30º
100º
120º
Centre Front
Centre Back Centre Back 180º
Right Front
Right Surround
Right Back
Centre Front 0º
Ceiling 0º
Right Front 30º
Right Front Height 30º
Right Wide60º
Right Surround 90º
Centre Front 0º elevation
Right Front Height 45º elevation
Right Surround Height 45º elevation
Ceiling 90º elevation
Right Surround Height 110º
Right Back 140º
30º
Right Front
Figure 4.1: Standard loudspeaker configuration for two-channelstereo.
0º30º
100º
120º
0º30º
110º
90º
135º150º
Centre Front
Centre Front
Right Front
Right Front
Right Surround
Right Surround
0º
180º
30º
100º
120º
Centre Front
Centre Back Centre Back 180º
Right Front
Right Surround
Right Back
Centre Front 0º
Ceiling 0º
Right Front 30º
Right Front Height 30º
Right Wide60º
Right Surround 90º
Centre Front 0º elevation
Right Front Height 45º elevation
Right Surround Height 45º elevation
Ceiling 90º elevation
Right Surround Height 110º
Right Back 140º
30º
Right Front
Figure 4.2: Standard loudspeaker configuration for 5.1 multi-channel audio. The actual positions of the surround loudspeak-ers at 110◦ shows the reference placement used at Bang &Olufsen for testing and tuning. Note that the placement of thesubwoofer is better determined by your listening room’s acous-tics, but it is advisable to begin with a location near the centrefront loudspeaker.
0º30º
100º
120º
0º30º
110º
90º
135º150º
Centre Front
Centre Front
Right Front
Right Front
Right Surround
Right Surround
0º
180º
30º
100º
120º
Centre Front
Centre Back Centre Back 180º
Right Front
Right Surround
Right Back
Centre Front 0º
Ceiling 0º
Right Front 30º
Right Front Height 30º
Right Wide60º
Right Surround 90º
Centre Front 0º elevation
Right Front Height 45º elevation
Right Surround Height 45º elevation
Ceiling 90º elevation
Right Surround Height 110º
Right Back 140º
30º
Right Front
Figure 4.3: Recommended loudspeaker configuration for most7.1 channel audio signals. The actual positions of the loud-speakers shows the reference placement used at Bang &Olufsen for testing and tuning.
0º30º
100º
120º
0º30º
110º
90º
135º150º
Centre Front
Centre Front
Right Front
Right Front
Right Surround
Right Surround
0º
180º
30º
100º
120º
Centre Front
Centre Back Centre Back 180º
Right Front
Right Surround
Right Back
Centre Front 0º
Ceiling 0º
Right Front 30º
Right Front Height 30º
Right Wide60º
Right Surround 90º
Centre Front 0º elevation
Right Front Height 45º elevation
Right Surround Height 45º elevation
Ceiling 90º elevation
Right Surround Height 110º
Right Back 140º
30º
Right Front
Figure 4.4: Loudspeaker positions associated with the speakerroles available in the television. The True Image processor de-livers a unique output to each of these output channels.
0º30º
100º
120º
0º30º
110º
90º
135º150º
Centre Front
Centre Front
Right Front
Right Front
Right Surround
Right Surround
0º
180º
30º
100º
120º
Centre Front
Centre Back Centre Back 180º
Right Front
Right Surround
Right Back
Centre Front 0º
Ceiling 0º
Right Front 30º
Right Front Height 30º
Right Wide60º
Right Surround 90º
Centre Front 0º elevation
Right Front Height 45º elevation
Right Surround Height 45º elevation
Ceiling 90º elevation
Right Surround Height 110º
Right Back 140º
30º
Right Front
Figure 4.5: Side view of the loudspeaker positions associatedwith the speaker roles available in the television
18
Index
active listening, 9adaptive, 8allpass frequency, 16assisted speaker calibration, 13audio level, 17automatic, 8
balance, 9bass, 7bass management, 13
clip protection, 12compression, 11crossover frequency, 15custom, 8
drama, 8dynamics control, 11
eco mode, 7enable filtering, 15envelopment, 11
fader, 9frequency tilt, 9
game, 8
headphones, 7height, 11
LFE input, 10LFE input to ceiling, 16listening style, 9loudness, 7loudness boost, 10
movie, 8music, 8
night listening, 8
panning, 15party mode, 8passive listening, 9
re-direction balance, 16re-direction level, 15
sound enhance, 9sound mode, 8sources menu, 17spatial control, 10spatial processing, 10speaker connection, 16speaker distance, 12speaker group, 12speaker level, 13speaker preset, 13speaker role, 12speaker type, 16speech, 8speech enhance, 9sports, 8stage width, 11subwoofer, 16surround, 11
time alignment, 16treble, 7
volume, 7volume, maximum, 7
19
