ALM Busy Circuits is a UK-based audio technology company founded in 2012 by Matthew Allum, launching with the Pamela's Workout Eurorack module — a compact clock and modulation source that became a staple of modular systems and established the brand's reputation for dense, multi-function digital utilities.

The company has grown to produce over 50 Eurorack modules spanning clocking, sequencing, sampling, effects, and voices, alongside standalone hardware and audio software. Notable products include Pamela's Pro Workout (an evolution of the original clock/modulation module), the MFX effects module and pedal, the QUAID GIGASLOPE quad slope modulator, Stem Ripper multi-channel recorder, FMco compact FM voice, and the Turismo modular workstation. The brand also produces cases, accessories, and VCV Rack software versions of some of its modules.

ALM is known within the Eurorack community for combining vintage-inspired sound design with contemporary digital implementation, and for pairing deep functionality with small HP footprints. The brand's modules are widely distributed through specialist retailers such as Perfect Circuit, Schneidersladen, and Moog Audio.

ALM Busy Circuits has 56 products cataloged on Equipboard, including Modular Synthesizers, Reverb Plugins, and Multi Effects Pedals. Their gear is featured by 16 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Andrew Huang, Richard Devine, and Sylvan Esso. ALM Busy Circuits's catalog spans the full price spectrum — from entry-level options to high-end flagships.