Podcast: Bob Casey spins double disks
At a sock hop in 1958, Bob Casey used two turntables to play music for the crowd. His set-up is credited with being the first double-decked audio-system used by a disc jockey. The two turntables, as well as the individual volume controls and early crossfader, created a seamless transition between songs. These innovations are now standard in modern DJ audio equipment. In this interview, Bob Casey describes his inspiration for the system, its debut, and its impact on future DJs.

From "Prototype Online: Inventive Voices," a podcast series from the Lemelson Center. If you like what you hear, why not subscribe? Copy this URL into your podcast software: http://invention.smithsonian.org/ podcasts/prototype.rss or access iTunes directly. If you prefer, you may download the podcast; right-click (PC) or control-click (Mac) and choose "save as." And while you listen, browse other podcasts in the series..
A production of the Smithsonian's Lemelson Center. Written and hosted by Laurel Fritzsch, podcast program manager. Audio production by Darrell Applezoller. Art Molella, executive producer. Joyce Bedi, webmaster. Bob Casey was originally recorded on 9 May 2013. Theme music is Sunshine & Sunshowers (Sparber Mix) - M.I.A. used with permission. Podcast released on 25 July 2013.