High-end audio equipments are normally digitally controlled by a a microprocessor (microcontroller) system. It’s necessary to have  digital interface that provide control for audio signal switching, as well as programming the gain to control the signal volume.

TEA6320 Multichannel Audio Selector and Volume Control2 circuit schematic

TEA6320 comes with the solution for digital control of audio source channel selector and volume control, very useful integrated circuit for modern audio or stereo application with embedded digital control. For more information on how to use this audio signal control IC chip, see the datasheet.