It is easy to mix multiple streams with DirectSound. You simply create secondary sound buffers, obtaining an IDirectSoundBuffer interface for each sound. You then play the buffers simultaneously. DirectSound takes care of the mixing in the primary sound buffer and plays the result.

It is easy to mix multiple streams with DirectSound. You simply create secondary sound buffers, obtaining an DirectSoundBuffer object for each sound. You then play the buffers simultaneously. DirectSound takes care of the mixing in the primary sound buffer and plays the result.

Your application can change the hardware output format by creating a primary sound buffer and calling the IDirectSoundBuffer::SetFormat method. Note that this primary buffer is for control purposes only; creating it is not the same as obtaining write access to the primary buffer as described under Access to the Primary Buffer, and you do not need the DSSCL_WRITEPRIMARY cooperative level. However, you do need a cooperative level of DSSCL_PRIORITY or higher in order to call the SetFormat method. DirectSound will restore the hardware format to the format specified in the last call every time the application gains the input focus.

Your application can change the hardware output format by creating a primary sound buffer and calling the DirectSoundBuffer.SetFormat method. You need a cooperative level of DSSCL_PRIORITY or higher in order to call the SetFormat method. DirectSound will restore the hardware format to the format specified in the last call every time the application gains the input focus.