Lancaster Audio is a music production software company specializing in guitar cabinet impulse responses (IRs) and Kemper amp profiles aimed at engineers, producers, and guitarists working in rock and metal genres. Formerly known as Rosen Digital Audio, the company built its reputation on detailed cab IR libraries covering 4x12 cabinets from Marshall, ENGL, and Mesa, bass cab IRs based on the Ampeg SVT, an officially licensed ENGL cabinet IR pack, and a collaboration with Warehouse Guitar Speakers (WGS).

The company is best known for its producer-signature Kemper profile packs, captured in collaboration with well-known rock and metal producers and engineers including Cameron Webb, Ulrich Wild, Bob Marlette, Warren Huart, Kristian Kohle, Adam Steel, Trey Xavier, and Sahaj Ticotin. Each pack pairs direct-profiled amp heads with matched cabinet IRs in Kemper's merged-profile format.

On the software side, Lancaster Audio develops PULSE 2, a free impulse response loader plugin built in collaboration with Aurora DSP. PULSE 2 is notable as a freeware IR loader available in AAX format for Pro Tools, alongside VST and AU builds, and ships with a selection of IRs drawn from the company's producer packs.

Lancaster Audio has 2 products cataloged on Equipboard, including Amp Simulator Plugins and Saturation Plugins. Their gear is featured by 1 artist, with the strongest followings in Rock and Metal. Notable users include Glenn Fricker.