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TD-3-MO Analog Bass Line Synthesizer - Image 1

TD-3-MO Analog Bass Line Synthesizer

EurorackAnalogMonophonic

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.

Released

Unknown

Status

In Production

Synthesizer
Format
Eurorack, Desktop
Type
Analog, Subtractive
Internal Battery
No
Voice
A/D
Analog
Polyphony
Monophonic
Oscillators
1
Oscillator Type
VCO (Voltage Controlled)
Voices
1
Filter
Yes
Envelopes
1
LFO
-
Effects
overdrive, distortion
Expression
Aftertouch
No
Velocity
-
MPE
-
Additional
sub oscillator, slide, accent, poly chain (16 voices), CV/gate I/O, filter FM, soft attack, sweep controls
Software
-
I/O
Audio In
-
Audio Out
1 mono
Headphone
1
MIDI
In, Out, Thru
MIDI Type
DIN (5-pin), USB
Ports
USB, CV/Gate
Wi-Fi
-
Workflow
Arpeggiator
-
Sequencer
Yes
Mod Matrix
-
Memory
250 patterns
Measurements
Dimensions
2.2" x 12" x 6.5" / 55.9 x 304.8 x 165.1 mm
Weight
-
Last updated Feb 25, 2026