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
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.