roundabout

A small patchable synthesizer.

Tech details:

• uses jumper wires and pin headers for patching
• CMOS-based circuitry
• 3 oscillators with sync and weighted CV inputs
• 2 goofy state-variable filters
• 2 frequency dividers
• 2 4-bit shift registers
• 4-bit R2R DAC
• 2 mults and an extra buffer
• left and right mixers with weighted inputs
• stereo output suitable for headphones
• powered by a 9v battery (rechargeable NiMH recommended)

Manual:

• https://github.com/MattKuebrich/roundabout/wiki

BOM:

• https://docs.google.com/spreadsheets/d/1eRZ8_PK5HJ3nKBCjX_7MApqO0d7YXJZ0Co2NMGjRWOA/ (Use this when sourcing parts)
• https://mattkuebrich.com/roundabout/ibom/ (iBOM)

Discussion:

• https://llllllll.co/t/roundabout/

Videos:

• "rungler" style patch
• roundabout patches
• roundabout battery drain shred sesh
• roundabout (diy chaotic noisemaker) via faux cyrillic
• more roundabout via faux cyrillic
• rack mounted roundabout adaptation for AE Modular via faux cyrillic
• roundabout + reverb/delay/EQ from Bluebox via Keurslager Kurt