[sdiy] PAiA Gnome repair

[Tim Parkhurst]

That’s… not a terrible idea. ;)

The best things (IMHO) about the Gnome were the PWM sound (although you had
to do it manually) and the EG repeat function. Emulate those and you’re a
good part of the way there. The other trick will be to get the ribbon to
work. A modern resistor strip will work better, I think. I know it’s a
deviation from the original, but what I would do is replace the ribbon with
9 pots (no knobs) to make a mini sequencer. One pot is clock speed, and the
other 8 are the notes. Turning a pot all the way up would set the end of
the sequence.

On a side note, I always thought it would be fun to design a Gnome-like
mini-synth based on a single 2164. Use one section for a VCO, two for a
12db SVF, and the last section for the VCA. You’d want the VCA EG to be
linear to work with the expo response of the 2164. You’d also need a
handful of op-amps. I went so far as to design some pretty good
euro-compatible panel layouts. Someone with more talent and time than I
should do something like this. More capabilities than the Gnome, but still
similar in spirit.

Anyway, I think you’ve got an interesting project going there. A Gnome case
with a decent sounding synth beneath it would be fun thing to see.

Tim (often mistaken for a gnome) Servo



On Tue, Aug 23, 2022 at 8:57 PM Benjamin Tremblay via Synth-diy <
synth-diy at synth-diy.org> wrote:

> I’m a heartless bastard. I removed the PAiA pcb, knobs, and switches and
> am installing a Teensy LC to monitor the control panel and a Teensy 4 to
> generate oscillator and noise. I’m feeding the audio sources into a 4 pole
> analog filter and a modern VCA chip. This will be the Gnome I dreamed of
> getting for fifty bucks when I was strange boy. Stable, wide dynamic range,
> with a hidden modulation matrix. No MIDI, no patch bay, just a toy.
>
> Benjamin Tremblay
>
> > On Aug 16, 2022, at 7:20 PM, Benjamin Tremblay <btremblay at me.com> wrote:
> >
> > _______________________________________________ Synth-diy mailing list
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-- 
Tim Parkhurst
---
"Imagination is more important than knowledge." - Albert Einstein
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