Lo-fi Percussion Module

Handmade Eurorack 8-bit 3-voice lo-fi percussion module

Specifications

• 3 voices
• selectable 8-bit waveform for each voice (sine, square, saw, noise)
• 3rd voice switchable to click (only one waveform period)
• infinite sound with decay pot turned fully to right for pseudodrones
• audio processing 8-bit/15.625kHz
• AVR ISP for software upgrades

Controls

• Pitch
• Pitch envelope (sweep)
• Decay
• Level
• Click switch for voice 3
• Trig button
• Voice selection buttons
• Waveform selection buttons
• Jumper to bypass output AC coupling capacitor resulting DC coupled output

Inputs

• 5V trig input, 100k impedance

Outputs

• Audio output (-2.5V – 2.5V AC coupled, 0V – 5V DC coupled)

Opensource

• schematics, PBC design, source code:
  https://github.com/buranelectrix/dredrum

http://buranelectrix.com/dredrum/