Auxiliary audio devices are audio devices whose output is mixed with the output of waveform and MIDI synthesizer devices. Use the following functions to query the capabilities of auxiliary audio devices and to query and set their volume level:
auxGetDevCaps
Retrieves the capabilities of a given auxiliary audio device.
auxGetNumDevs
Retrieves the number of auxiliary audio devices present in a system.
auxGetVolume
Queries the volume level of an auxiliary audio device.
auxSetVolume
Sets the volume level of an auxiliary audio device.