Set wave out device for this interface instance.
virtual __stdcall int SetWaveOutDevice(unsigned int nIndex) = 0;
User can specify wave out device for each interface instance. If you have multiple soundcards, with this function you can specify output soundcard. You can also create 2 interface instances and play 2 songs, each song on different soundcard.
Default wave output is set to WaveOutWaveMapper (class is using waveform-audio output device capable of playing the given format).
This function has effect on next call to play function. If you call this function while song is playing there is no effect. You need to stop playing and start playing again to apply new settings.