For my first post, here is a track played on my DIY Pd based polyphonic modular synthesizer:
This is a live single take, the audio is recorded directly from the analog output and is not processed. What you can hear is the raw sound of this synth.
Eurorack modules are not producing any sound, they are only controllers for Pd which is running sound generation over 8 voices. All knobs and switches positions are transmitted over I2C to an x86 SBC and are converted to OSC protocol to go to Pd. Patch cables are detected and used to setup dynamically the software connections between the different Pd blocks.
Eveything is DIY: electronics, firmware, pcb, case, front panels, etc ...
I have been working on this project for two years, and I will need few more months to fill the upper Eurorack frame !