The bespoke recording apparatus that Milman Parry took to Yugoslavia in the summer of 1935 – manufactured by Sound Specialties Inc of Waterbury, Connecticut, it had two turntables and a toggle for switching instantaneously between them – got me wondering about the history of such devices. Parry used his equipment for recording rather than playback, but it’s the same principle that later allowed generations of DJs to keep a dancefloor grooving indefinitely.




