Circuit bent "alphabet pal" talking caterpillar

Published on May 27, 2019 Jason Hotchkiss

“A talking toy with pitch control knob added and ability to trigger all the switch inputs over MIDI so they can be sequenced into slightly unsettling gibberish / beatboxing or even better to chop up the nursery rhyme tunes into some off-kilter woozy psych

Using a Moog MF drive pedal for tone control and lowpass filter (to knock off a little bit of the

Casio Casitone MT-205 & CVOCD

Published on Nov 16, 2018 midierror

“Using the external input, its possible to trigger the 8 drum sounds and sequence them using a CVOCD!

This required 4 stereo cables split into 8 mono jacks – and a quick configuration of the CVOCD. Everything is sequenced in Ableton Live!

This actually triggers notes as the note offs are sent in Ableton. I tried some workarounds in Max4Live and with S-Trig

MIDIfied Tesla Coils

Published on Sep 19, 2018 Jason Hotchkiss

“Just about ready with ‘Tesla Organ’ for Fort Process sound art festival this weekend in Newhaven, UK

This is a quick test with a MIDI file of Bach’s Toccata & Fugue in Dm

Two solid state coils based on Steve Wards design with connected secondaries, floating ground and independant feedback antennae. Running at c.100VAC.


via this auction

“Four analog CV outputs, Twelve gate outputs, a wide range of MIDI to CV mapping options at a budget price!
CV.OCD is a device which converts MIDI signals to the Control Voltage (CV) and Trigger/Gate signals which are used to control traditional analog synthesizers.

As well as doing this useful bit of “plumbing”, CV.OCD is designed to open up some creative options that go

Bonjour Le Strum: Unboxing my DIY Midi strum controller

Published on Jan 20, 2018 Olivier Ozoux

“Le Strum was one of my first DIY project, and I remember how happy I was that the little LED turned on and it sent Midi signals after I finished soldering all these little part together.

Then I completely forgot about until recently. Here’s a quick little demo of this strange but fun little Midi controller”

You can find info on Le Strum by Jason

Sync Tab for ARPIE

Published on Sep 13, 2017 midierror

“A neat device to sync your pulse clock devices to the ARPIE and an external clock. Works with Pocket Operators, Monotribes, Volcas and more!”

The synchtab for arpie was introduced in 2015. Note it’s spelled both synchtab with an h as you can see here, and synctab minus the h here where you can order one.

Setting up your Sync Tab

Published on Sep 13, 2017

Hotchkiss Quad VCA/mixer with digital brain – eurorack module prototype

Published on Aug 26, 2017 Jason Hotchkiss

“Quick jam/demo of a prototype module I’m working on.

It is a quad VCA module in 8HP based on Coolaudio V2164 with full analog signal path. VCAs are digitally controlled and the firmware (a work in progress) generates independent envelopes per VCA channel – supports trigger sequencing, direct CV control per channel, crossfading or triggering across all