Alesis HR-16 Circuit Bending

Alesis HR-16 pitch control install

This is the last of the Alesis HR-16 lot I purchased from the estate of former Pure Prairie League member George Powell. I added a 28 point patch bay, an LTC1799 precision oscillator for pitch control – and that is switchable between knob control or photocell control (for using light as a pitch controller). I … Read more

Pitch control for cassette players

06/18/2025 – Recently updated with better explanation. Here is a stripboard layout that I did for cassette player speed mods. It is based on a drawing from the old Casper Electronics website. It only requires a small piece of stripboard (4×6 ) and 5 components. I am sure that there are other ways to affect … Read more

Circuit Bent Carry-A-Tune Cassette Player

POTAR X Carry-A-Tune circuit bent tape player

These are cool little handhelds, no record function but they do offer an echo mic! Not a whole lot of space inside so I concentrated my efforts on the tape speed and getting an output other than the built-in speaker. The results are pretty satisfying. The 2 knobs get you from stock sound, to pitched … Read more

Modified DOD FX70 Stereo Flanger

DOD stereo flanger mods

I have had this old DOD Flanger kicking around in my parts box for about 10 years. I finally got around to testing the mods on it, and WOW! It’s a killer. From added LFO tones and noise to delay-like repeats The mods are pretty simple, you replace the 3 internal trim pots with comparable-value … Read more

Speak and Math MidiSpeak

When I saw the midi speak kit online I knew I had to have one for my Speak and Math. The circuit-bent Speak and Math is already a ton of fun to play with. Sick, sputtering, looping glitches, word fragments, and random number strings are common, so getting it to trigger along with your drum … Read more

POTAR Design Concern