Pro Audio DSP is a UK-based audio software company founded by Paul Frindle and Paul Ryder, both veterans of the Sony Oxford and Sonnox plug-in lineage. Frindle previously helped design the SSL E and G series consoles and the Sony OXF-R3 digital console, while Ryder led software development on the Oxford plug-ins that became Sonnox. The company is designed in Oxford, England, and focuses on a small catalog of deeply engineered mixing and mastering tools rather than a broad plug-in line.

The company is best known for the DSM (Dynamic Spectrum Mapper), a processor that combines multi-band compression, expansion, limiting and spectral matching. DSM captures the spectral and dynamic fingerprint of a source or reference and uses many more frequency bands than a conventional multi-band compressor, with particularly fine resolution in the mids and highs. The plug-in has gone through several revisions, with DSM V3 adding a prismatic compressor, expander, limiter and spectral sidechain in a single instrument.

Pro Audio DSP's products are distributed and sold through Plugin Alliance and Brainworx, which handle licensing and support, and are available in VST, VST3, AU and AAX formats for macOS and Windows.

Pro Audio DSP has 2 products cataloged on Equipboard, including Compressor Plugins and Dynamic Processor Plugins. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include Mr. Bill.