Re: analog sound demonstrations (James Beauchamp )

Subject: Re: analog sound demonstrations
From:    James Beauchamp  <jwb(at)TIMBRE.MUSIC.UIUC.EDU>
Date:    Wed, 27 Nov 1996 13:49:29 -0600

Gregory Kramer: >Jim Beauchamps answers seem reasonable but carrying around a NeXT is the >kind of thing Richard wanted to avoid. Actually, carrying a NeXTStation and display around is not any more cumbersome than say a MiniMoog plus an oscilloscope. Note that the NeXTs each have a 56001 DSP chip in them so that synthesis is real time. >Analog oscillators and mixers are easy enough to build. But getting analog oscillators to synchronize ( fk = k*f1) with variable phase is not so easy. I made a six oscillator set in the 60's where harmonics were generated in the ultrasonic range and heterodyned down to audio. It had voltage-controlled harmonic amplitude and fundamental frequency controls. Don Buchla built one in the late 60's or early 70's, but I don't know how well it operated. Jim Beauchamp

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