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MOTM-120R Sub-Octave Multiplexer

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Posted inMOTM   Tags:   March 15th, 2008

3 Comments to 'MOTM-120R Sub-Octave Multiplexer'

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  1. Richard Mechling said,
    August 2nd, 2008 at 10:27 am

    Hello Mr. B
    Just a call for help… for suggestions in using Cynthia’s SUBMUX DELUXE, which I see you had a hand in developing ? Can’t seem to get anything useful out of it. Hope you have the time to reply !
    -RM

  2. Richard said,
    August 2nd, 2008 at 3:15 pm

    Hi RM,

    The MOTM-120R can be used as an audio signal processor, or as a control voltage generator. If you’re trying to get cool audio processing, try patching two VCOs into A and B and using the CROSS mode. Use the MIX or STAIR outputs with AC coupling. For an example of what that can do, listen to this:
    http://pugix.com/synth/cross-product/

    For voltage generation, use an LFO as a clock into the A input, select the SUB mode and DC output coupling. Using the four mix pots, you can create a complex repeating sequence. The STAIR output produces a rising sequence of voltages. Use the SUB1 – SUB4 outputs as triggers for envelop generators to get a new note every 2/4/8/16 ticks of the input clock.

    As far as my contribution to the design, I made a prototype version of what became the Tellun DB-120R circuit. Scott Juskiw then created the DB-120R PC board, based on my circuit. (I have upgraded my prototype board to a DB-120R board.) The circuit is very simple. Cynthia Webster had offered the MOTM-120 packaged into a Modcan format and was inspired to create the SUBMUX DELUXE, which is no longer available from Cyndustries, so you are lucky to have one. However, anyone can still buy MOTM-120 parts from Synthesis Technology and a DB-120R board from Tellun and do this for themselves, providing they can find or make the panel. I am lucky to have a genuine Stooge MOTM-120R panel.

    Richard B.

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