The audio manager API enables you to coordinate audio devices and control the flow of audio sources. It enables you to control sound quality, including balance, fade, bass, treble, center channel, sub-woofer, surround sound, crossover filtering, and equalization.
The audio manager works with the audio driver model. The audio manager API includes the following APIs: audio source control, WAV-in, WAV-out, Equalization, Surround Sound, and Volume. An Auto PC audio system can have more than one output destination, including a speaker, a USB device, and a computer. Because the most common destination is a speaker, the audio manager API does not include an API to control the selection of the audio output destination. If your application requires destination control, access the applicable audio device driver directly to choose the audio destination.
The following illustration shows how the audio manager API controls the audio system.