Definitions:

1. Type of sound system, featuring four separate audio channels, offering a more enveloping sound experience than traditional two-channel stereophonic systems. ADJECTIVE
   • In the 1970s, many artists experimented with quadrisonic sound to enhance their live performances and studio recordings.
2. Used to describe systems where sound is transmitted through four distinct speakers, positioned in a way that surrounds the listener. ADJECTIVE
   • The concert featured a quadrisonic sound system, making the audience feel like they were surrounded by the music from all sides.

Synonyms:

• four-channel
• quadraphonic
• quadriphonic