New Optical Scan Results from the
Smithsonian Volta Laboratory Collection
Updated April 23, 2013
Optical
scanning is a process to restore historic sound recordings,
non-invasively.? The technology used here
was developed mainly by a collaboration of Lawrence Berkeley National
Laboratory and the Library of Congress.
The
Smithsonian Institution National Museum of American History (SI NMAH) Volta
Laboratory collection consists of early experimental sound recordings
(1881-1886) created by Alexander Graham Bell, Charles Sumner Tainter, Chichester A. Bell, and
associates.? In collaboration with the
Smithsonian some of these recordings are being restored and presented to the
public.? The present set includes Bell?s own
voice.
In December of 2011 a first release of restored recordings from the SI NMAH Volta Laboratory collection was made.? See volta-release.html
Some general references
? This is the general website for the IRENE/3D optical scanning projects?? http://irene.lbl.gov/
? This is a report about 3D optical scanning 3D-Scanning.pdf
? This is a general report on the optical scanning development project Sound-Project-0311.pdf
? Some simple details on optical scanning are given here
The files posted here are provisional. If referred to as FILTERED,? low pass filter has been applied.? The basic goal was clarity.
Some specific references
Smithsonian\Audio\Pages from Science 1888.pdf? This is a report in Science of a presentation made at the time concerning the Volta Lab research on sound recording.
Scholar Patrick Feaster has researched the collection and
created a discography at the Smithsonian: ?A
DISCOGRAPHY OF VOLTA LABORATORY RECORDINGS?
AT THE NATIONAL MUSEUM OF AMERICAN HISTORY?
More information on the Volta Laboratory can be found on Wikipedia or by searching on the name.
This is a summary of the media studied so far.? There is clearly a large variation in the physical characteristics of the discs and the methods employed at the Volta Lab.
RPM are estimates. New records are highlighted in red.
Cat. No |
Description |
Pitch |
Depth |
Amplitude |
RPM |
287654 |
Variable density photo disc |
~2 mm |
NA |
NA |
~100 ? |
287686 |
Variable area photo disc |
~4 mm |
NA |
|
|
312119 |
Lateral cut plated reverse copy |
700 microns |
100 microns |
350 microns |
120 |
287920 |
Green wax vertical cut on brass |
1.7 mm |
135 microns |
~35 microns |
60 |
287700 |
Wax on composition board, vertical cut, cracked |
600 microns |
95 microns |
10 microns |
20 |
287701 |
Wax on composition board, vertical cut |
400 microns |
50 microns |
5 microns |
40 |
287881-A |
Wax on composition board, vertical cut |
600 microns |
60 microns |
10 microns |
15 |
287860.2 |
Foil on plaster on cardboard, vertical cut |
140 microns |
250 microns |
150 microns |
120 |
312123 |
Wax on metal cylindrical mandrel + rotation |
1.8mm |
90 microns |
9 microns |
90 |
Cat. No. 287881-A
This disc contains a direct recording of A.G. Bell?s voice, as documented in the notes stored with the artifact, and verbal statements.? The disc is extensively cracked and the wax appears to be delaminating from the binder board base.? There is also extensive particulates and debris in the grooves.? This disc is judged to be unplayable with a stylus method.
P. Feaster discography
? Date: 15 April 1885
? Inscription [in wax around
center]: Record made April 15 1885 | AGB and C.A.B. | to test
reproduction of numbers. | Disk A. G. B. No. 1
? Format: White or
transparent wax composition on binder?s board, cardboard ~243 mm; spindle hole
~25 mm; outer diameter of wax coating ~230 mm; inner diameter ~71 mm cracked
surface (was stored upside down when found); single, well modulated groove
band.
? Documentation: A paper
is stored in the cabinet with the recordings: Contents of Disk AGB No 1. |
Disk with Numbers | Experiment made April 15th 1885 |
1, 2, 3, 4 &c?to 50 | 10, 20, 30, 40 &c to 100 | 100, 200, 300 &c
to 1000 | 1000, 2000, 3000, &c to 10,000 | 10,000; 20,000; 30000 &c to
100,000 | 100,000 200000 30000 [sic] to 1,000,000 | 3571 3571
3571 | 3571 123,941 125,873 | 1,945,876 35,900 33878
| 48715 790042 4,530,870 | $45.? $89.73 $4029.46 | 35 cents. 25 cents 30 cents
50 cents | half a dollar a quarter dollar | 3 dollars & ? $5? $7.29 | $10?
$3785.56 | This record has been made by Alexander Graham Bell in the presence
of Dr. Chichester A. Bell?April 15th on the 15th of April 1885 at the Volta Laboratory 1221 Connecticut Avenue,
Washington D. C. In witness whereof?hear my voice | Alexander Graham Bell -- Referenced in Floyd
K. Harvey, ?Mementos of Early Photographic Sound Recording,? SMPTE Mot. Imag J. 91:3 (March 1, 1982), 237-244, as evidence
favorable to the existence of a recording of Alexander Graham Bell?s voice;
however, Harvey did not make the connection with 287881-A.
? Related item: Box ?E?
Full recording raw Smithsonian\Audio\2013 Release\287881-Merge.wav YouTube Version
Full recording filtered Smithsonian\Audio\2013 Release\287881-Merge-DCFIR.wav YouTube Version
?This record was made?.? filtered Smithsonian\Audio\2013 Release\This-record-DCFIR.wav YouTube Version
?Hear my voice?? raw Smithsonian\Audio\2013 Release\Hear-my-voice-raw.wav YouTube Version
?Hear my voice?? filtered Smithsonian\Audio\2013 Release\Hear-my-voice-DCFIR.wav YouTube Version
Cat No. 287860.2
This disc is composed of foil on plaster of Paris, on a cardboard backing.? It appears to be an attempt, made in 1885?, to reproduce a recording made in 1881 by a molding process.? The original master also had a number of generations involving electrotyping as well.? The surface of this disc varies by 2 mm in height which is unusual.
P. Feaster discography:
287860 [1]
? Date: ca. 1885? (from 1881 master)
? Format: cardboard with
plaster layer and tinfoil surface.
? Duplicated from: 287881-B = 287669
? Related item: Box ?F?
associated with catalog number 287860
287881-B = 287669
? Date: 29 December 1881
? Older description for
287669: Heavy, 10-3/4-inch metal disk, ?-inch thick, lead body, copper face,
deep grooved record, with hole and recess in center. Marked,
?S. T. December 29, 1881.? Noted as ?not found 1937,? but the
description matches the duplicate-numbered 287881-B and is presumed here to be
the same object.
? Inscription [raised,
mirror image, in copper near center]: S. T. Dec. 29th 1881.
? Format: Copper
electrotype disc cemented with plaster of paris to
type-metal base with raised outer lip and spindle hole and other holes at
center. Total external diameter ~275 mm; external diameter of copper disc ~268
mm; interior diameter of copper disc ~84 mm; diameter of spindle hole ~22 mm.
Trace pitch ~1.3 mm per rotation, raised vertical cut phonogram with recessed
groove between rotations; trace runs counterclockwise from periphery, so
?original? would have run clockwise from periphery.
? Documentation: THN
5:22-30, 34-36, 46-47. Content (transcribed at THN 5:29): T-r-r-r.??This
record was first made in paraffin-wax by the voice; an electrotype in copper
was then taken from it; and this iron phonogram from which the sounds are being
reproduced was transferred from the copper electrotype. The original phonogram
in the paraffin-wax was made on the twenty-ninth day of December eighteen
hundred and eighty one. I am a magnetical Graphophone, what are you? To be, or not to be, that is the
question. How is that for high?? T-r-r-r, etc. THN 5:47 reports that this electrotype negative was severely
damaged in the process of dubbing it twice to an iron disc (possibly 287670*).
? Duplicates: 287860 [1]; 287898; possibly 287670*. The first two don?t match the experiment for which the disc was originally prepared and are likely to have been created later, perhaps around 1885.
Raw audio file: Smithsonian\Audio\2013 Release\287860-BL100-D1-MERGE.wav
Filtered audio file:Smithsonian\Audio\2013 Release\287860-BL100-D1-MERGE-DC-FIR.wav YouTube Version
Cat. No. 312123
In this case the
?record? was an entire recording machine and the sound bearing media was
integral to the assembly.? The unit was
placed in the beam of the scanner and rotated by an external drive system.
Notes from P.Feaster discography:
? Date: Final recording made September 1881. Machine was in use for similar experiments throughout the preceding summer.
? Format: Edison phonograph with widened groove filled with wax and cut with a vertical recording.
? Inscription (in ink, on attached card): The following words and sounds are recorded upon the cylinder of this Graphophone: ?T-r-r?T-r-r?There are more things in heaven and earth Horatio, than are dreamed of in our philosophy?T-r-r?I am a Graphophone and my mother was a Phonograph.
? Documentation: THN leading up to 3:44, Notes accompanying Volta Laboratory sealed package of October 1881.
Left: View of machine.? Center: During scan at Berkeley Lab. Cylinder is rotated by plastic timing pulley. Right: Close-up under the confocal probe.
Full recording raw: Smithsonian\Audio\2013 Release\wax-graph--44100-MERGED.wav YouTube Version
Full recording filtered: Smithsonian\Audio\2013
Release\wax-graph--44100-MERGED-DCFIR.wav
YouTube Version
Below is a simplified explanation of the process used to non-invasively scan the artifacts from the Volta Laboratory collection.? Data is acquired optically so that delicate or damaged materials are protected.
Research supported by the Institute of Museum and Library
Services, the Smithsonian Institution, and the Library of Congress.
Email for information: chhaber@lbl.gov