A view of a small section of an optical scan of the broken cylinder. The missing section is visible but the rest can still be played back, something not possible with traditional playback. The Left half of the image shows a small portion of the cylinder. The right half of the image is a zoomed in view of the data inside the small yellow rectangle on the left.
A small section of the optical scan of the cylinder. The images shows an 8mm wide band of the cylinder flattened out. The crack is broad enough that the grooves do not line up across the schism. Special Processing techniques can still recover audio from the cylinder.
A cracked cylinder. There are two flexible strips of preservation-friendly plastic wrapped around cracked sections to help support the cylinder during scanning. The cylinder was recorded by Alfred Kroeber. It records a Wiyot song.
Cylinder 20.2. is shown here on a white cone custom built to provide support for cylinders that are broken. The cylinder is missing a shard from the bottom but the white cone will still support it and allow it to be scanned.
View of a small portion of the cylinder (Left) and a detail (Right). The detail is on the right and is a magnified view of the portion boxed in yellow in the view on the left. The cylinder is a documented as being a duplicate of cylinder 14-1700.1. It has a very rough and irregular surface texture. The grooves are barely under the surface noise. Audio may be difficult to extract. This is a more extreme example of the difference in quality between duplicates and originals.
Overview of a small portion of the cylinder (Left) and a detail (Right). The detail is a magnified view of the portion boxed in yellow in the overview. The image shows the end of the groove; the cylinder where the recording stopped. 14-1700.1 is documented as an original recording. The grooves are very clearly discerned, and the surface is very regular and smooth. This is a stark contrast to the duplicate of this cylinder.
Two cylinders one presumed to be a duplicate from a mold of the other. The cylinder with the lighter gray finish (right) is documented as being a duplicate of the darker colored cylinder (Left). Both cylinders record a Yana song, sung by Ishi.
Photo of cylinder 14-2314.2 with visible damage at the bottom. The white band is a preservation-friendly strip of flexible plastic. It is wrapped around damaged portions to provide support during scanning and prevent breakage. The cylinder was recorded by Alfred Kroeber. It records a Wiyot song.
Zoomed in view of a small portion of the cylinder. The black web like structure is surface damage due to mold eating away the surface and creating surface depressions. The damage is severe enough that it is visible on the surface of the cylinder.
An overview of a small portion of the cylinder. The image shows one of three recording sessions, recorded on the same cylinder. An image processing algorithm has marked the groove bottoms with blue, information that will be used to trace the path of the stylus and produce the recorded sound. Some damage from mold is visible.
Overview of a small portion of cylinder 14-2320.1. The image shows the end of the groove; where the recording stopped. There is a large scratch in the cylinders surface visible as the large horizontal distortion at the bottom of the image.
An overview of a small portion of the cylinder. The image shows one of three recording sessions, recorded on the same cylinder. This small portion of the cylinder is about 50 seconds of audio. Some damage from mold is visible.