Digital Compression System

Digital Compression System, or DCS, is a sound system developed by Williams Electronics. This advanced sound board was used in Williams and Bally pinball games, coin-op arcade video games by Midway Manufacturing, and mechanical and video slot machines by Williams Gaming. This sound system became the standard for these game platforms.
The DCS Sound system was created by Williams sound engineers Matt Booty and Ed Keenan, and further developed by Andrew Eloff.