An electronic mixtape, it features illbient, glitchbeat, and chillwave styles. Instrumentals consists of Clams Casino's reconstructions of backing tracks he originally produced for rappers such as Lil B and Soulja Boy. In July 2011, Instrumentals was reissued by Type Records as a physical release. It features instrumentals of tracks that he produced for various rappers, including some bonus songs. It was self-released as a free digital download on March 7, 2011. Instrumentals is the debut mixtape of American record producer Clams Casino.