[sdiy] pre Uprocessor schematics with ADC/DAC?

Dan Snazelle subjectivity at hotmail.com
Thu May 21 15:28:35 CEST 2009

this might be a strange request but i am very interested in ANY information/links/ideas on finding old schematics from the 70's (audio related but not just necessarily synth) that use Analog to Digital Converters AND Digital To Analog converters but which use logic instead of a microprocessor to control them.

all the synths i have looked at that have ADC/DAC setups have a programmed brain of some kind controlling them (prophet 5, etc)

but i know there were some that used TTL or CMOS to send commands.

anyway....one particular example is the EVENTIDE H910.

i think i could learn some interesting things, such as how they got the Audio In and Out, how they used multiplexers or sample and holds, and also what types of clocks, and if they had presets,etc.


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