Modular Synthesizer

I started this project in December 2023, for two main reasons. First of all, I wanted to play around with analog and digital electronics more, and this seemed like the perfect project to do so. Second, I wanted to get into making some sort of music. I never really got the chance to learn an instrument when I was growing up, and I feel like I kind of missed out. I probably won't ever make any full songs or recordings; it will just be another way for me to express myself creatively.

I chose to design my modules based off the Eurorack format, slightly modified to meet my needs (the modules are 2U high to save on PCB costs). Audio signals are 10Vpp, while the CV is restricted to 0-5V. The system is powered with an old ATX computer PSU that I scavenged, which has worked just fine. The case was designed and built by me, and can fit 2x84hp worth of modules.

Outside of the VCO (which was heavily inspired by Moritz Klein's design), the circuitry and programming for every module was designed from scratch by me. My favorite module so far has to be the low-pass gate; it makes everything sound much more musical.

Current modules:

• Clock

• CV+Gate Sequencer

• Chordinator (a triple quantizer that can be set up to produce dyads or triads)

• VCO x3

• 3-Channel Mixer x2

• Low-Pass Gate

• Rhythm Sequencer (a programmable gate/drum sequencer with 7 channels)

• CV11 (a dual precision adder with some inputs normalled to 0-5V CV, that can also act as a buffered multiple in a pinch)

• Snare Drum

• Kick Drum

• Orbit (an LFO with frequency sync)

• Speaker

You can find more information about the system, including schematics and code, on my Github page.