A small section of the optical scan done of cylinder 14-2403. Thick dark lines are the recorded groove bottoms. Thinner more irregular lines are marks from a bad playback stylus damaging the surface.
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.
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.