Apparatus for recording/reproducing converted four-channel audio

Audio information reproducing apparatus

Audio processor for single, channel, matrixed two-channel and un

Audio signal processor

Audio system which not only enables the application of the surro

Deck lock mechanism and library apparatus

Method and apparatus for cutting information into a record carri

Multi-channel stereo reproducing apparatus

Sound system with source material and surround timbre response c

Stereophonic motion picture photographic sound-tracks compatible

Surround-sound system with motion picture soundtrack timbre corr

Synchronous recording and playback of left and right stereo chan

Time compression/expansion with synchronized individual pitch co