Caelum Audio is a British audio software company founded in 2019 that develops plugins, loops, and sample libraries for music producers. The small UK-based team focuses on reworking classic hardware and production techniques into streamlined modern tools, often at accessible price points, with a handful of free plugins sitting alongside their paid lineup.

The catalog spans saturation, dynamics, and modulation effects. Notable titles include Tape Cassette and Tape Pro (tape and cassette emulation), Beef (saturation and distortion), Schlap (a characterful program-dependent compressor), Smoov (a cleaner, more transparent dynamics tool), Choric (a chorus effect), and Flux Pro (a multi-FX modulation plugin designed to transform static sounds into moving, evolving textures).

The company has built a reputation in bedroom-producer and lo-fi circles for combining approachable interfaces with distinctive sonic character, and its plugins are regularly featured on retailers such as Plugin Boutique and covered in outlets including MusicTech and Attack Magazine.

Caelum Audio has 11 products cataloged on Equipboard, including Multi-Effect Plugins, Chorus Plugins, and Compressor Plugins.