quadraphonic

adj.

四声道的；

What's wrong with quadraphonics
An Optimum Quadraphonic FM Broadcasting System
APPARATUS FOR REPRODUCING QUADRAPHONIC SOUND
A Compatible Stereo-Quadraphonic (SQ) Record System
Headset for reproducing quadraphonically recorded information
Recording Techniques for SQ Matrix Quadraphonic Discs
Directional enhancement system for quadraphonic decoders
Quadraphonic impulse responses for acoustic enhancement of audio tracks: measurement and analysis
The Implementation Of Ambisonics For Restoring Quadraphonic Recordings
Competing Networks and Proprietary Standards: The Case of Quadraphonic Sound