MATRIXSYNTH: New STG Modules


Friday, May 07, 2010

New STG Modules

via Suit & Tie Guy

"these modules are the next in the "dot series" (.BAM, .VCA, etc.) i've ordered the first rev PCBs this week and if they check out i'll get the front panels.

this is .MIX. it's a mixer with a transistor makeup gain stage copied from the Moog CP3, including the rail voltages (a regulator is used to provide the -6V rail).

there are no opamps in this thing at all, and it will be driven into distortion easily. alot of the tones on Redshift records are multiple oscillators being distorted by the CP3 mixers.

the output attenuator is bipolar.

the .COM is a comparator/divider optimised for audio and based on the SH-101's suboctave circuit. a fourth output which ANDs the main output and the first suboctave is provided in addition to the original 3. the signal input is at the top and the other input jack is for voltage control of the threshold for PWM.

by "optimised for audio" what i mean is that its output swing isn't 0-5V, but -5V to 5V.

i might change the text from "threshold" to "pulse width". i don't know. they're both accurate.

'what would i need this for?' you might ask, i would answer that maybe you want to use a filter as an oscillator, or perhaps you'd like suboctaves on your sawtooth oscillator.

thanks very much,
---
Suit & Tie Guy
suitandtieguy.com
stgsoundlabs.com"

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