Applied Acoustics Systems (AAS) is a Canadian software developer specializing in virtual instruments, synthesizers, and audio effects for music production and sound design. Known for products like Lounge Lizard, Chromaphone, Ultra Analog, and Strum, the company is recognized for its innovative use of physical modeling technology to create expressive, realistic, and highly versatile sounds. AAS offers a wide range of software instruments and expansion sound packs designed to provide musicians, producers, and sound designers with powerful creative tools for recording and music production.