Playing Phonographf cylinders with Playing Phonographf cylinders with the technology of the XXI-st century.the technology of the XXI-st century.
Contactless recordplayerContactless recordplayerDiFiLTON-ARC kft.DiFiLTON-ARC kft.
Pál Sztano the late chief audio restorer of the MTA-ZTIPál Sztano the late chief audio restorer of the MTA-ZTIMusic and Folklore Research Institute of the Music and Folklore Research Institute of the
Hungarian Academy of Sciences.Hungarian Academy of Sciences.
Phonograph cylindersPhonograph cylinders
The advantages of contactless The advantages of contactless reproductionreproduction
➢ The cylinders are not damaged. The cylinders are not damaged.
➢ Even damaged or broken cylinders may be Even damaged or broken cylinders may be read.read.
➢ There are no reproduction problems caused There are no reproduction problems caused by the contact of the pickup needle with the by the contact of the pickup needle with the groove.groove.
➢ The large number of samples read, enables The large number of samples read, enables us to better reconstruct the original us to better reconstruct the original recording during processing.recording during processing.
Traditional data acquisitionTraditional data acquisition
One sensor, one analogue reproduction One sensor, one analogue reproduction chainchain
Optional digital phase:Optional digital phase:
- A-D converter- A-D converter- Digital restoration- Digital restoration
Multi-sensor data acquisitionMulti-sensor data acquisition
➢ Many sensors, with as many analogue Many sensors, with as many analogue reproduction chainsreproduction chains
➢ A-D converters for each analogue A-D converters for each analogue channelchannel
➢ Digital preprocessing using digital data Digital preprocessing using digital data from each channelfrom each channel
➢ Optional digital restorationOptional digital restoration
The cross-section of the grooveThe cross-section of the groovemeasured in pixelsmeasured in pixels , 0,4 um, 0,4 um
Groove cross-sectionGroove cross-section
Surface viewSurface view
Experimental playerExperimental player
The first optical sound recorded The first optical sound recorded by Béla Bartók in 1915by Béla Bartók in 1915
SZTANOGRAFSZTANOGRAF
AutofocusAutofocus
Automatic Groove trackingAutomatic Groove tracking
Video picture of the groove cross-sectionVideo picture of the groove cross-section
Image of a groove after preprocessingImage of a groove after preprocessing
Recognition of faulty partsRecognition of faulty parts
Reconstruction ParametersReconstruction Parameters
The sound of a Berlin cylinder without The sound of a Berlin cylinder without filtering. A recording offiltering. A recording of
the Orchester Bummelmarsch made in the Orchester Bummelmarsch made in about 1905about 1905
(Needle Sztano1 Sztano2)(Needle Sztano1 Sztano2)
Main Data ofMain Data of
the Recording the Recording Equipment Equipment
➢ 25 sample25 sampless/sec/sec
PALPAL➢ 20 rev/hour20 rev/hour➢ 48480x time at 0x time at
12kSps12kSps➢ ~1 TB / cylinder~1 TB / cylinder
of the Restoring of the Restoring SystemSystem
➢ 220 sample0 sampless/sec on /sec on
Intel dualIntel dual core core Pentium 3 GHzPentium 3 GHz
➢ 112200x time at 00x time at 12kSps12kSps
TargetsTargets
RecordingRecording ➢ 250 sample250 sampless/sec/sec➢ Adjustable Adjustable
lightinglighting➢ 200 rev/hour200 rev/hour➢ 4848x time at x time at
12kSps12kSps➢ ~0,~0,005 TB/cylinder5 TB/cylinder
Restoring systemRestoring system ➢ 250 sample250 sampless/sec /sec
on GRIDon GRID system system➢ 4848x time at 12kSpsx time at 12kSps➢ Enhancing Enhancing
the the algorithmalgorithm
The best procedure abroadThe best procedure abroad
Reconstruction of Reconstruction of Mechanically Mechanically Recorded Sound Recorded Sound from an Edison from an Edison Cylinder using Cylinder using Three Dimensional Three Dimensional Non-Contact Non-Contact Optical Surface Optical Surface Metrology Metrology
V.A. Fadeyev and Carl V.A. Fadeyev and Carl Haber Haber
Lawrence Berkeley Lawrence Berkeley National Laboratory National Laboratory
Thank you for your attentionThank you for your attention
MTA-SZTAKIMTA-SZTAKIDiFiDiFiLLTTONON-ARC kft.-ARC kft.
MTA-ZTIMTA-ZTI
Manno Sándor Manno Sándor
Gerencsér LászlóGerencsér László
Csetverikov Dmitrij Csetverikov Dmitrij
Németh IstvánNémeth István
Bisztray FrigyesBisztray Frigyes
Feketű József Feketű József
Méder IstvánMéder István
Torma BalázsTorma Balázs
Zalán FrigyesZalán Frigyes
