Ever since the time of Edison, the media on which music is recorded has been a source of fascination to us. From wax cylinders to old lacquered 78s to
45 RPM singles and 33 RPM LPs to compact discs, we've wondered: just how do these things produce sound? This enduring technological mystery has prompted some rather interesting tales.
Coloring the rims of CDs with a green marker improves their sound quality.
The maximum length of CDs was based on Beethoven's 9th symphony.
A "record-reading" man can identify music by examining record grooves.
Records with more than one groove per side exist.
The Library of Congress is transferring its entire audio collection to