"In his 'photosonic' process, Dudon shines light through a series of semi-transparent, rotating discs that slow and modify the light waves’ frequencies; the resulting waveforms are picked up by photoelectric (solar-power) cells connected to standard analog amplifiers."

In his new book, Mp3: The Meaning of a Format, McGill University professor Jonathan Sterne exhaustively and eloquently traces the history of the mp3 from the initial hearing model developed in Bell Labs to the current debates about piracy. As the author argues, each time we rip a CD to our hard drives, we're not only saving space in our living rooms or ensuring we have the appropriate gym soundtrack, but also reaffirming a fundamental idea about the limits of human perception.

I interviewed Jonathan Sterne for Pitchfork about his new book. While conducting the interview, I thought Pitchfork readers would like to know about how AT&T’s capitalistic policies in the 1910s and 1920s laid the groundwork for those compressed bits of data currently clogging their hard drives, and other gentle, science-laden facts about the mp3’s history. I was wrong. But not to worry! Here are the cut bits.

"'Famous sounds' are sounds that have been created or used by somebody, liked and then copied by many others, and thus earned a 'classic' status."

Transcripts and recordings of pilots' last words before crash.

An hour-long mix, showcasing "the history of cut up music - be it avant garde tape manipulation, turntable megamixes or bastard pop mash ups."