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.
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.
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.
After an image has been produced a software algorithm finds the bottoms of the grooves and traces them in blue. The bottom of the groove is where playback stylus would have rested, and dictates the path the stylus would have taken around the cylinder. Therefor the data along the groove bottom is most important in producing audio.