ALM

Explore 34 ALM vintage synthesizer models — specs, production history, reviews, and market values in the VTA archive.

Modular

• AB2 — The ALM Busy Circuits AB2 is a compact dual comparator for Eurorack, delivering precise gate signals from analog sources—essential utility in 4HP.
• ADDAC200PI — The ADDAC200PI is a compact dual-channel pedal integrator that bridges Eurorack and guitar effects with clean, active signal conditioning in just 4HP.
• Akemie's Castle — The ALM Akemie's Castle brings authentic 4-operator FM synthesis to Eurorack using vintage Yamaha chips—knobs included. Find full specifications here.
• Akemie's Taiko — ALM Akemie's Taiko is a 18HP Eurorack FM drum module using a vintage Yamaha OPL3 chip, known for its chaotic, expressive.
• ArmSID — The ALM Busy ArmSID brings the authentic, gritty sound of the C64's SID chip into Eurorack, preserving its quirks and character in a modern, reliable package.
• ASQ-1 — The ALM Busy Circuits ASQ-1 is a tactile, screenless Eurorack sequencer that blends SH-101 simplicity with modern polyphonic sequencing and live quantization.
• AXON-1 — The ALM AXON-1 is a 4HP Eurorack expander that adds four assignable, memory-aware CV inputs to the Squid Salmple, MFX, and Pamela's PRO Workout.
• AXON-2 — The ALM AXON-2 is an 8HP expander that adds four CV inputs with offset knobs and two performance buttons to ALM's SQUID, MFX, and Pamela's PRO Workout.
• AXON-II — The ALM Busy Circuits AXON-II is an 8HP expander that adds hands-on CV control and performance buttons for Pamela's Pro Workout and Squid Salmple.
• Beast's Chalkboard — A precision dual-channel octave shifter and buffered mult for Eurorack, built for tuning stability and CV control since 2013
• Befaco Rampage — The Befaco Rampage brings Serge-style analog slope generation to Eurorack—raw, expressive, and essential for West Coast synthesis.
• Buff Mult — The ALM Buff Mult is a 3HP passive multiple for Eurorack—minimalist, reliable, and essential for clean signal splitting without power draw.
• BXx2 — The ALM BXx2 brings the gritty, saturated preamp sound of 80s/90s Boss BX mixers into Eurorack—limited to 300 units, discontinued, and already iconic.
• Circuits — ALM Busy Circuits redefined Eurorack with smart, playful modules like Pamela’s Workout and the System Coupe—digital, analog, and utterly essential.
• CIZZLE — ALM CIZZLE brings Casio CZ-style phase distortion synthesis to Eurorack with dual oscillators, voltage-controlled chords, and that iconic digital squelch.
• Cyclone — ALM Cyclone — an obscure outboard arpeggiator from the late 1980s, documented only through a brief 1988 Mix Magazine mention at $249 with tempo tap.
• D.S.G — The ALM Busy Circuits D.S.G. is a passive Eurorack module that splits and distributes DIN sync signals from vintage Roland gear into modular-compatible triggers.
• Daiko — The ALM Tyso Daiko is a dual-voice 12-bit wavetable drum module that blends digital chaos with analog warmth, redefining Eurorack percussion.
• DSO — The ALM Busy Circuits DSO is a dual-channel digital oscilloscope for Eurorack, offering real-time waveform visualization in a compact 12HP module.
• FBF 101 — A Eurorack utility module combining buffered multiples and a precision CV-controllable adder. With full specifications and production years.
• FIZZLE GUTS — The ALM Busy Circuits FIZZLE GUTS is a rare Eurorack module using salvaged Casio FZ-1 filter chips — only 30 made, cult status, raw analog character.
• FMco — The ALM FMco packs 2-operator FM synthesis, chord generation, and a built-in envelope into 8HP of Eurorack—digital precision meets analog workflow.
• Haswell's Taiko — The ALM Busy Circuits Haswell's Taiko (discontinued) is a 12 HP digital drum module with hand-drawn waveforms, limited to 100 units.
• HPO — The ALM HPO is a 2hp Eurorack headphone output module known for its slim design and transparent sound. Specs, user insights, and current pricing.
• Jumble Henge — The ALM Busy Circuits Jumble Henge is a fixed-architecture 8HP Eurorack mixer that filters and pans signals based on patch position—creative, immediate.
• MCF — The ALM MCF is a 6HP 3-pole analog filter exclusive to the System Coupe, prized for its clean multimode outputs and self-oscillating precision.
• MCFx2 — The ALM MCFx2 is a dual 3-pole analog filter with smart internal routing, self-oscillation, and 1V/oct tracking—simple, powerful, and built to patch.
• MCO — The ALM MCO packs seven vintage-inspired digital synth engines, chords, and full voice architecture into 6HP—making it a Eurorack powerhouse from 2024.
• MCO (mk II) — The ALM Busy Circuits MCO (mk II) packs seven 90s-inspired digital synth engines into 6HP, blending nostalgia with modern reliability.
• Mega Milton — The ALM Busy Circuits Mega Milton packs a stereo line converter, mixer, slew, sample & hold, and buffered mult into 8HP of essential Eurorack utility.
• MEGA-TANG — The ALM MEGA-TANG is a 4-channel linear VCA and stereo mixer for Eurorack, designed for live performance with expandable I/O and click-free muting.
• Megaslope — The ALM Megaslope is a five-stage Eurorack function generator that morphs between envelope, LFO, and sequencer with unmatched tactile control.
• MFD — The ALM MFD is a compact, reliable Eurorack stereo crossfader designed for seamless live transitions—minimalist, no-nonsense, and essential for performance.
• MFX — The ALM MFX packs 16 vintage-inspired digital effects into 6HP of Eurorack, blending classic reverb, delay, and glitch processing with deep CV control.
• Milton — The ALM Busy Circuits Milton is a compact 6HP Eurorack utility that combines line-level boosting, buffering, mixing. Covers the complete spec table.
• MiXi — The ALM Busy Circuits MiXi is a fixed-architecture stereo mixer that uses resonant filters and spatial routing to transform mixing into a creative act.
• MKII — The ALM MCO MKII packs seven digital synthesis engines, 4-voice polyphony, and preset-driven workflow into 6HP—making it a modern Eurorack powerhouse.
• mmMIDI — The ALM mmMIDI is a no-frills, 4HP MIDI-to-CV converter that prioritizes simplicity and reliability—perfect for DAW sync and dual-voice control.
• mmMidi mkII — The ALM mmMidi mkII is a 4HP Eurorack MIDI to CV converter with USB-C and dual-channel precision, bridging modern devices and analog synths effortlessly.
• mmT — The ALM mmT is a 3HP expander that adds eight MIDI-triggered gate outputs to the mmMIDI, ideal for drum triggering and sequencer control.
• MT EX2 — An expander module that adds a second effects send and return to each channel of the MEGA-TANG mixer. Find full specifications and production years here.
• MT-EX1 — The ALM MT-EX1 is a compact Eurorack expander that adds four inputs to the MEGA-TANG mixer, solving input starvation with analog simplicity.
• MUM M8 — The ALM Busy Circuits MUM M8 brings the Akai S950's iconic jungle-era filter into Eurorack, with voltage control, resonance, and gritty saturation.
• O A — ALM Busy Circuits O/A/x2 (ALM010), a compact 4HP dual-channel attenuverter and offset module for Eurorack. Documentation is thin but basic specs are confirmed.
• O/A/x2 — The ALM Busy Circuits O/A/x2 is a dual attenuverter with bipolar offset and LED monitoring in 4HP—essential for precise CV shaping in Eurorack.
• Optomix — A 2HP Eurorack VC mixer using optocouplers for smooth, organic signal blending—minimal size, maximum character. With the complete spec table.
• Pam's 8 — The original ALM Pam's 8 redefined Eurorack timing with deep clock division, real-time editing, and a cult-following that shaped a generation of modular synthesis.
• Pam's New Workout — ALM's Pam's New Workout redefined rhythmic modulation in Eurorack with clock-synced waveforms, Euclidean rhythms, and a clear OLED interface — a discontinued but enduring classic.
• Pam's PRO Workout — The ALM Pam's PRO Workout (2023) redefines rhythmic modulation with full-color feedback, cross-modulation, and Flex timing in 8HP.
• Pam's Workout — The original ALM Pam's Workout (2012) redefined Eurorack clocking with 8 programmable trigger outs, memory, and a cult-following yellow button.
• Pamela's Disco — ALM Busy Circuits Pamela's Disco syncs Eurorack to Pioneer DJ gear via PRO DJ-LINK, translating network tempo into modular clock signals.
• Pamela's New Workout — The ALM Busy Circuits Pamela's New Workout redefined clock modules with 8 synced modulation outputs, OLED interface, and deep programmability in 8HP.
• Pamela's PRO — The ALM Pamela's PRO Workout (2022–) is the central nervous system of Eurorack—8 CV outputs, full-color display, and deep rhythmic control.
• Pamela's Pro Workout — The ALM Busy Circuits Pamela's Pro Workout redefines Eurorack modulation with 8-channel sync, full-color UI, and deep cross-modulation in 8HP.
• Pamela's Workout (2012–2018) — The original ALM Pamela's Workout (2012–2018) turned Eurorack timing into an instrument with 8 programmable trigger outputs, CV-controlled clocking, and an amber LED interface.
• PE-1 — The ALM PE-1 is a 5HP Eurorack parametric EQ inspired by Portastudio mixers, blending surgical tone control with analog color and character.
• Pedal — The ALM MFX Pedal brings 18 Eurorack-grade DSP effects to the pedalboard—MIDI, expression, tap tempo, and studio-quality processing in a compact stomp.
• PEXP-1 — The ALM PEXP-1 adds dedicated MIDI & DIN Sync outputs to Pamela’s New Workout, turning it into a master clock for modular and vintage gear.
• PEXP-2 — The ALM PEXP-2 adds MIDI and DIN Sync outputs to Pamela’s New Workout, turning it into a master clock for hybrid studios.
• Pip Filter — A compact 4HP Eurorack filter with resonance, pingable envelope, and built-in VCA—musical, efficient, and essential in tight racks.
• Pip Filter & LFO — Compact 4HP Eurorack modules from ALM: the Pip Filter offers a 2-pole VCF with pingable envelope, while the Pip LFO doubles as a VCO—raw, efficient.
• Pip LFO — The ALM Busy Circuits Pip LFO packs analog waveforms, VCO mode, and full CV control into 4HP—making it a modern Eurorack essential.
• Pip Slope (2015–Present) — ALM Busy Circuits Pip Slope — a 4HP Eurorack envelope generator with morphing shapes, evolving loop modes, and voltage-controlled attack and decay.
• Pip Slope Mk II — The ALM Busy Circuits Pip Slope Mk II packs a dual-mode envelope generator, shape morphing, and intelligent looping into 4HP—making it one of Eurorack's most powerful compact modulators.
• Pipes — ALM Busy Circuits Pipes (2016–2020) is a 2HP digital pulse processor that transforms triggers into complex, evolving rhythms—compact, reliable.
• PPEXP-2 — The ALM Busy Circuits PPEXP-2 expands Pamela’s PRO Workout with MIDI, DIN sync, and x24 outputs—essential for syncing modular to external gear.
• PPEXP1 — The ALM Busy Circuits PPEXP1 is a 4HP expander that adds buffered MIDI, DIN sync, and fixed clock outputs to Pamela’s PRO Workout for rock-solid external gear syncing.
• PPX2 — The ALM Busy Circuits PPX2 is a compact, buffered expander that delivers rock-solid MIDI and DIN Sync from Pamela’s Pro Workout—essential for hybrid modular setups.
• Purespace — ALM Busy Circuits Purespace (2021–) is a deep, stereo digital reverb module with dual engines, full CV control, and shimmer/nonlinear modes—built for immersive sound design.
• QCD — The ALM Busy Circuits QCD is a chaotic, no-knobs analog modulator that turns clock signals into evolving, unpredictable control voltages—minimalist.
• Quadrax — The ALM Busy Circuits Quadrax is a 32HP Eurorack module offering four deep, interactive slope generators with OLED feedback—ideal for evolving textures and rhythmic chaos.
• Quaid — ALM Quaid Megaslope: a 19HP Eurorack module that morphs between 5-stage envelope, LFO, and sequencer — hands-on, no menus, all voltage control.
• Quaid GigaSlope — ALM Busy Circuits Quaid GigaSlope (2023–): 52hp quad 13-stage modulator that redefines voltage control in modular synthesis.
• Quaid Megaslope — The ALM Busy Circuits Quaid Megaslope is a 19HP Eurorack module that functions as a five-stage envelope, LFO, and sequencer with real-time voltage control and tactile sliders.
• Rample — The ALM Squarp Rample is a no-compromise Eurorack sampler with 4 channels, unlimited sample length, and deep CV control—ideal for live performance and modular integration.
• RG 16 — A 16HP Eurorack module offering CV-controlled signal routing with integrated sequencing. Covers detailed specs and production dates.
• S.B.G — The ALM S.B.G is a compact 4HP Eurorack module that safely integrates guitar pedals into modular systems with level matching, wet/dry blend, and CV protection.
• S.B.G-PRO — ALM S.B.G-PRO: the essential Eurorack send/return interface for studio-grade balanced audio and safe CV control of external gear.
• S.B.G. Pedal Interface — The ALM Busy Circuits S.B.G. Pedal Interface ($140) bridges Eurorack and guitar pedals with level matching, CV regulation, and dry/wet crossfade in 4HP.
• SB-Link — The ALM Busy Circuits SB-Link is a no-nonsense, 4HP Eurorack interface that safely bridges guitar pedals and modular synths with switchable direction and level matching.
• SCM — The ALM Busy Circuits SCM is a lo-fi Eurorack sampler that turns digital limitations into musical character—warm, wobbly, and full of surprise.
• SCR-H8 — The ALM Busy Circuits SCR-H8 is a voltage-controlled 8-stage shift register that turns digital logic into generative rhythms and chaotic sequencing for Eurorack.
• SEQ-3 — The ALM Busy Circuits SEQ-3 is a hands-on, performance-ready Eurorack step sequencer with per-step gate control, skip functions.
• SID GUTs — The ALM SID GUTS DELUXE (2015) drops a real C64 SID chip into your Eurorack. 19 HP, 6581/8580 support, $525.99 CAD. Authentic chiptune chaos.
• SID GUTs Deluxe — The ALM SID GUTs Deluxe brings the authentic Commodore 64 SID chip into Eurorack with voltage-controlled chords, filter modulation, and raw 8-bit character.
• SIZR — The ALM Busy Circuits SIZR is a 2HP Eurorack module that intelligently cleans up and reshapes gate timing, turning chaotic triggers into tight, musical rhythms.
• SLOG — The ALM Busy Circuits SLOG is a chaotic 6HP analog feedback delay that turns instability into music—beloved by noise artists and experimental synth fans.
• SNF-1 — The ALM Busy Circuits SNF-1 is a raw, aggressive state-variable filter that trades precision for character — perfect for noise, industrial textures.
• Sputnik — The ALM Busy Circuits Sputnik — vintage synth equipment. Specifications, history, and review. Covers production years. Covers production years.
• Squid — The ALM Squid Salmple (2019) is an 8-channel Eurorack sampler with 11-second recording, bit reduction, and CV sampling. Specs, flaws, and real-world quirks.
• Squid Salmple — The ALM Busy Circuits Squid Salmple is an 8-channel Eurorack sampler that eats audio and CV, then spits out glitched, lo-fi.
• Stem Ripper — ALM Busy Circuits Stem Ripper (2025) — an 8-channel Eurorack recorder made in England. Captures full modular patches without external gear.
• Stem Ripper Thru — The ALM Stem Ripper Thru is a 2HP passive expander that duplicates inputs for cleaner patching—no power, no fuss, just reliable signal pass-through.
• Sum — The ALM Stereo Sum is a 4HP unity-gain stereo summing mixer with DC-coupled inputs, ideal for merging audio or CV in compact Eurorack systems.
• SwinSID — The ALM Busy SwinSID brings the legendary C64 SID chip into Eurorack with modern reliability and full voltage control — chiptune authenticity without the meltdown risk.
• System Coupe — The ALM Busy Circuits System Coupe is a complete 84HP modular groovebox blending digital sampling, analog filtering, and generative sequencing in a portable.
• Taiko — The ALM Dinky's Taiko is a 12-bit Eurorack drum module that turns controlled chaos into musical gold, blending digital noise and wavetable synthesis with analog EQ warmth.
• Tangle Quartet — Four ultra-clean THAT 2164 VCAs in 8HP—silent, precise, and indispensable in any serious Eurorack system. Find full specifications and production years here.
• TAZM-O — ALM TAZM-O (2023–): a compact analog thru-zero oscillator with Serge-inspired morphing, SH-101 sub-octaves, and voltage-controlled FM index.
• Turismo — The ALM Busy Circuits Turismo is a complete 84HP Eurorack workstation blending analog warmth, digital grit, and live-ready sequencing in a travel-friendly case.
• VCA — The ALM QUAD VCA (Tangle Quartet) delivers four silent, DC-coupled linear VCAs in 8HP—minimalist, reliable, and essential for clean signal routing.

Other Models

• busy-circuits — ALM Busy Circuits — London Eurorack maker of the Squid Salmple 8-channel sampler and 6HP MCO MkII digital voice.