Tag: Audio

By Posted on Posted in Finished, Hardware, Software Tagged with , , , , , ,

A pocket-sized modular synthesizer built around a Raspberry Pi Pico (RP2040), with all patching done on a 12×12 grid instead of physical cables.

Oscillators, filters, envelopes, and a handful of other modules get placed onto the grid and wired together however you like, so the same box can become a DX7-style FM patch one moment and a slow, drifting drone the next. Audio streams out over I2S, with the synthesis math running in fixed-point to keep the Pico’s core from choking under a full patch. A rotary encoder, a volume potentiometer, and a 128×64 OLED handle all the interaction, and a 3.5mm TRS-A MIDI input lets it take notes from an external keyboard or sequencer. It runs off a LiPo cell and a booster board, small and portable enough to carry around.

A desktop simulator ships alongside the hardware, letting patches be designed and auditioned before ever touching the device, with patches transferable both ways. It comes with eight demo patches plus a few built-in presets that mimic the DX7, and saves patches to EEPROM so nothing is lost when it’s powered off.

Status: Finished.

Project page: https://git.dejvino.cz/dejvino/NoiceSynth

By Posted on Posted in Finished, Hardware Tagged with , , , ,

Replace the old electronics of your tapedeck with an mp3 player, all while keeping the retro controls working!

A conversion project that takes a beautiful piece of obsolete hardware and gives it a new life. The aim is to retain as much of the look and the controls as possible. Buttons still control the playback, turning the knobs impacts the sound. Yet there is a tiny MP3 player board that loads the music from a microSD card and the turning cassette reels are just for show.

Status: Finished.

Project page: https://git.dejvino.cz/dejvino/tapedeck-player