[sdiy] portable monophonic synth ideas

Elain Klopke functionofform at gmail.com
Mon Sep 2 08:05:34 CEST 2013

I built the original Minisynth (no keyboard and no S&H) for a good
friend of mine and managed to cram it into a gutted DVD drive. I
wasn't really fond of the oscillators in it, but for an FX synth it's
really good.

and the array of batteries is a really good idea that I hadn't ever
considered before...

On Mon, Sep 2, 2013 at 12:50 AM, Pete Hartman <pete.hartman at gmail.com> wrote:
> The various MFOS Mini-Synth options seem like they could work well,
> you might want to add a MIDI 2 CV adapter (there are some very small
> ones that I have heard work well), and then you can use any small MIDI
> capable keyboard for it....
> I was able to fit the Mini Synth Plus (basically a Mini Synth + a
> Sample & Hold) into a cigar box, and definitely battery powered (needs
> two to be biploar though).
> Not sure about driving headphones, that may require an additional
> circuit as well.
> I think there's probably some question of how well do you want the
> VCOs to track etc as well.  I have had little trouble with mine, but
> Ray makes a point that they are not expected to be "good" at tracking
> V/Oct....  And I'm not doing anything especially demanding with it.
> On Mon, Sep 2, 2013 at 12:08 AM, Elain Klopke <functionofform at gmail.com> wrote:
>> hey all,
>> I'm looking around for ideas on how to go about building a small,
>> preferably battery powered, monophonic analog synth. Something that
>> will be able to be played in the studio, on stage, and in the break
>> room during lunch (headphones most likely).
>> I have a 25-key keybed minus the PCB with the contacts, a MFOS VCO
>> board, ADSR board, and somewhere a built sate variable VCF and dual
>> VCA.... but those boards are kinda big in the grand scheme of needing
>> more modules still and wanting portability.
>> Also, any clues on how to do a compact keyboard scanning matrix
>> that'll output control voltages?
>> Thanks in advance for any clues and ideas,
>> -Ian
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