MATRIXSYNTH: TI SN76477 DIY Synth


Sunday, April 19, 2009

TI SN76477 DIY Synth

via this auction
"The SN76477 is a fully loaded synthesizer on a chip. Within its silicon boundaries lie the following functions:

* A Voltage Controlled Square Wave Oscillator
* A Super Low Frequency Oscillator (a fancy term for LFO)
* A VCA-like 'modulator'
* A Sweepable Digital Noise Generator (shift register based)
* A Filter for the Digital Noise Generator
* An Envelope Generator (Attack/Decay)
* A programmable Mixer

Thomas Henry published a design for a controller module, dubbed "The SuperController" based around the SN76477. In this application, the SN76477 was primarily used as a source for syncable gates, triggers, and LFO signals, but it did also feature the sweepable digital noise generator as a signal output.

John Blacet brought the SN76477 into the commercial synthesizer world with his excellent "Dark Star Chaos" module, a discontinued and still much-sought-after design produced by his company, Blacet Research. The DSC2000 took great advantage of the SN76477's capabilities. Its application was for creating sounds ranging from the sublime to the monstrous. One can still read about its functionality on the Blacet history page Blacet Research Cool Old Stuff Page. The SN76477 is also detailed in Wikipedia and many vintage synth sites."


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