TD-3-MO Analog Bass Line Synthesizer

Legendary acid lines got a serious upgrade with mods inspired by the original Devil Fish tweaks from the '90s, turning this compact powerhouse into a growling beast for modern bass duties.

Pure analog signal path delivers that classic VCO with sawtooth and square waveshaping, paired with a 4-pole resonant low-pass filter now featuring MIDI control and frequency modulation for wild timbral shifts. Hands-on knobs handle cutoff, resonance, envelope depth, decay, plus new additions like extended slide time, 3-mode sweep speed for accent pulses, soft attack, and a sub-oscillator with level switch for deeper lows. The intuitive 16-step sequencer holds 250 patterns across 7 tracks, with accent and slide programming, while overdrive and post-VCA distortion add grit—complete with CV/Gate I/O, full MIDI (DIN/USB), poly chain up to 16 voices, mono out, and headphone jack. At just 2.2 x 12 x 6.5 inches and 1.8 lbs, it's a desktop or Eurorack-ready module powered by 9V DC, blending vintage vibe with expanded control.

Users dig its authentic 303 squelch pushed further by the mods, praising the value, connectivity, and instant inspiration from the sequencer—though some note the distortion can feel basic and build quality shows room for improvement.