Brand
ALM / Busy Circuits is a UK-based modular synth manufacturer known for clean design, clever engineering, and modules that quietly become essentials in a Eurorack system. Founded by musician and engineer Matthew Allum, the brand has a reputation for solving real musical problems rather than chasing gimmicks, which is why their modules show up in so many serious, long-term racks.
The range covers everything from rock-solid clocking and sequencing to sampling, modulation, mixing, and performance utilities. ALM modules are typically compact, logically laid out, and designed to work beautifully with other brands as well as with each other. Whether you’re building a tight live performance system or a deep studio rack, ALM Busy Circuits gear is trusted for its reliability, musicality, and thoughtful approach to modular synthesis.
Category
The Percussion category here includes all of the electronic instruments and modules designed to create rhythmic and percussive drum beats & sounds rather than melodic or harmonic tones. This includes drum machines, percussion synth voices, sample-based units, trigger pads, and modular percussion modules used to build beats, grooves, and rhythmic textures.
Percussion gear is central to electronic and modern music production, providing everything from classic drum sounds to experimental rhythms and textures. These instruments are commonly used in studio and live setups alongside synths, samplers, and sequencers, forming the rhythmic backbone of electronic, techno, hip-hop, ambient, and experimental music.
Tags
Drum covers electronic drum machines and rhythm instruments used to create beats, patterns, and percussive sequences. These instruments allow sounds to be programmed, synthesised, sampled, and triggered in real time, often with step sequencers, performance pads, and hands-on controls. They are central to electronic music production and live performance, providing tight timing, repeatable grooves, and creative control over rhythm, dynamics, and texture.
Eurorack is a modular synthesis format with standardised dimensions, power connections, and signal levels. Eurorack systems are built from individual modules mounted in cases, allowing users to create highly customisable instruments tailored to specific sound design and performance needs.
A module is a self-contained unit designed to perform a specific function within a larger system. Modules are commonly used in modular and Eurorack setups, where each unit handles tasks such as sound generation, modulation, filtering, or control, allowing systems to be built and expanded piece by piece.
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