ALM Busy Circuits
Lineup 20 / 44 in corpus
Lineup transcribed from https://busycircuits.com/collections/eurorack-modules ↗, last checked 2026-05-13.
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ASQ-1
Multimode Eurorack sequencer that simultaneously sequences two CV/GATE and four trigger patterns, and performs synchronised quantisation of an external CV signal. Uses SH-101 style step-time note entry and classic drum machine pattern editing with mechanical computer-style keys.
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Beast's Chalkboard
Dual channel stepped voltage source and adder for eurorack. Primarily intended as a dual octave switcher for VCOs, with additional uses including sequence transposition, FM ratio creation, buffered CV distribution, and VCO calibration. Also functions as a 1-to-6 or dual 1-to-3 buffered mult.
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CIZZLE
A dual digital phase-distortion VCO inspired by the Casio CZ synthesizers, featuring two oscillators with morphable PD algorithms, resonance wave generation, ring modulation and noise modes, built-in VCAs, CV-able chord mode with up to 8 voices, and stereo output with widening.
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Jumble Henge
16 input stereo spectral mixer with a unique patch-based mixing interface. Each input has a carefully tuned resonant analog filter and a unique fixed pan value. Includes a Mix control for filter depth and a clean external stereo input for chaining.
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MCO (mkII)
Compact digital multi-voice synthesiser and VCO in 6HP, offering eight synthesis voice programs (wavetable, additive, JP-style digi-synth, vocoder, virtual-analog, bass/drum, SID chip, and vocal formant), each with assignable CV modulation, up to four-voice chords, built-in envelopes and LFOs, and dual audio outputs.
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Mega-Tang
4-channel linear VCA and stereo mixer providing per input control over level, effect send, pan and muting. Features mono effects send with stereo return, soft mute buttons with LED indicators, individual VCA outputs, and an expansion port. All signals are Euro level and DC coupled (bar the effects return).
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O/A/x2
Dual channel attenuverter with per-channel bipolar voltage offset and LED monitoring, usable for CV editing (LFO phase, level, DC offset) and audio (attenuation, inversion, mixing)
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Pip Filter
A compact 4HP voltage-controlled 2-pole low-pass filter with resonance, a pingable trigger input, and a built-in VCA. Cutoff is controlled by a knob and dual CV inputs with an attenuverter; resonance reaches self-oscillation; a trigger input enables percussive plucked sounds; the VCA is normalled open for independent amplitude control.
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Pip LFO
Compact 4HP all-analogue low frequency oscillator with wide frequency range, voltage control, bipolar and unipolar waveform outputs (triangle, saw, sine, square), reset input, and switchable VCO mode with V/Oct tracking.
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Quaid Megaslope
Five stage function generator or modulator which operates in one of 3 modes: a multistage 'CZ' or 'Juno' style complex envelope, a super flexible LFO, and a step sequencer with per step programmable slew or slides. Each mode produces a varying output voltage moving from point to point across a set number of chained together stages.
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Squid Salmple
8 channel audio & CV sampler designed for immediate real time sampling, editing and mangling within a modular context. Features Pamela's Workout style UI, CV control of all parameters, on-the-fly USB bank loading/saving, and 11 seconds of 16-bit/44.1kHz sample time per channel.
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Stereo Sum
Unity gain stereo summing mixer with four stereo input pairs summed as pairs to two independent mix outs or all as a single combined mix. DC coupled for audio or CV. Top mixer outputs normalize to bottom mixer section.
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Tangle Quartet
8 HP quad linear VCA built around THAT 2164 VCA ICs. Four independent DC-coupled linear VCAs, each with its own signal input, level/CV input, and individual output, plus a summed mix output. CV inputs are normalled to +5V so each channel doubles as a manual level control, making it usable as a clean four-channel mixer as well as a VCA bank. Marketed as a no-frills, bleed-free linear VCA; reverse-polarity protected and skiff-friendly.
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TAZM-O
Analog triangle core through-zero FM oscillator with continuous morphing waveshape, voltage-controlled FM index, built-in output VCA, voltage-controlled octave transposition, dual sub-octave pulse outputs, hard sync, and LFO mode.
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Tyso Daiko
A dual 12-bit digital wavetable drum voice with full voltage control and an analog EQ output path; twin voices are independently triggered and share pitch and envelope parameters of a swept wavetable oscillator, with voice 1 passing through a voltage-controlled analog tilt EQ and voice 2 through a digital wavefolder.
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MFX
The MFX is a compact 6HP Eurorack stereo digital audio multi effects processor. It offers 17 different full featured effects programs plus a number of metering utilities.
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Pamela's PRO Workout
Compact programmable clocked modulation source providing 8 highly editable outputs producing various control voltage signals correlated and synced to a BPM based master clock. Each output can produce simple clocked triggers, complex rhythmic waveforms, quantised melodic patterns, or random chaos with direct and assignable CV control over numerous parameters.
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Pip Slope
Compact envelope and function generator supporting Attack/Decay and Attack/Sustain/Decay envelopes with voltage control, morphable slope shapes, looping modes including decreasing amplitude and time, and an End of Cycle trigger output.
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Quaid Gigaslope
Four-channel multi-mode modulator with each channel outputting a variable staged slope that can act as a complex envelope, flexible LFO, or step sequence. Each slope can contain up to 13 stages with per-stage level, time, and curve controls, per-slope quantiser with 19 scales, and selectable output ranges.
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Pamela's NEW Workout
A compact programmable clocked modulation source providing 8 highly editable outputs producing various control voltage signals correlated and synced to a BPM-based master clock, with per-output waveform shaping, Euclidean rhythms, quantization, logic operations, and CV control.
- Akemie's Castle ↗
- AXON-2 ↗
- FMco ↗
- HPO ↗
- MCFx2 ↗
- Mega Milton ↗
- MFD ↗
- mmMidi ↗
- MUM M8 ↗
- Pamela's Disco ↗
- PE-1 ↗
- S.B.G ↗
- S.B.G-PRO ↗
- Stem Ripper ↗
- Akemie's Taiko ↗
- Boss Bow Two ↗
- AXON-1 ↗
- mmT ↗
- MT-EX1 ↗
- MT-EX2 ↗
- PPEXP1 ↗
- PPEXP2 ↗
- Stem Ripper Thru ↗
- Passive Mult ↗