BASS_ASIO_Monitor
Sets the direct input monitoring state.
BOOL BASS_ASIO_Monitor(
    int input,
    DWORD output,
    DWORD gain,
    DWORD state,
    DWORD pan
);
Parameters
| input | The input to set the monitoring state of... -1 = all. | 
| output | The suggested output for the monitoring. | 
| gain | Suggested output gain... ranging 0 (silent) - 0x7FFFFFFF (+12 dB), 0x20000000 = 0 dB. | 
| state | Monitoring state... 0 = off, 1 = on. Other settings may be possible depending on the drivers. | 
| pan | Suggested output pan... 0 = left, 0x7FFFFFFF = right. | 
Return value
If successful, TRUE is returned, else FALSE is returned. Use BASS_ASIO_ErrorGetCode to get the error code.
Error codes
| BASS_ERROR_INIT | BASS_ASIO_Init has not been successfully called. | 
| BASS_ERROR_UNKNOWN | Some other mystery problem! | 
Remarks
Not all devices/drivers support monitoring. The output, gain and pan settings are also just suggestions, and may be ignored by the device/driver.