Update: More on the Buchla 700
Snip from More on the Buchla 700:
"THE 700'S ARCHITECTURE includes four dedicated computers, each of a different nature, and each optimized to its particular function. The nerve center of the instrument is a general purpose digital computer. Responsible for user communication, data processing, and supervisory control, this "host" computer can be programmed to accommodate varied musical needs.
A second computer "massages" incoming data. It directs conversion of analog voltages into digital form, discards redundant information, and transmits essential data to the host computer.
Receiving instructions and data from the host, a third computer (called the multiple arbitrary function generator) directs the instantaneous progress of 190 acoustic variables, each with a time resolution of 1/2000 of a second. This facility enables specification of complex sonic detail and extends the possibilities for expressive control.
A fourth computer, essentially a pipelined digital signal processor (DSP), is responsible for producing the 700's twelve voices. Built into this computer are unusually powerful algorithms for sound generation, including frequency modulation, waveshape interpolation, and timbre modulation (unique to the Buchla, this technique significantly augments the electronic vocabulary."
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