Loudness control circuit

Loudness volume control system

Loudspeaker reproduction apparatus in vehicle

Method and apparatus for processing an audio signal in...

Method and system for determining a gain reduction parameter...

Method of generating test tone signal and test-tone-signal...

Pitch shift apparatus and method

Recording and reproducing apparatus for audio signal

Signal control apparatus

Sound field forming circuit and sound field forming apparatus

Sound quality adjustment device

System for automatic compensation of low frequency audio...

Tone control apparatus for front and rear channels

Tone control device and sound volume/tone control device for red

Tone-control circuit and method for conditioning respective...

Varying loudspeaker spatial characteristics in a vehicle