Set wave in device for this class instance.
function SetWaveInDevice(Index: Cardinal): Integer;
User can specify wave input device for each interface instance. If you have multiple soundcards, with this function you can specify input soundcard. You can also create 2 interface instances and play 2 songs, each song on different soundcard.
Default wave output is set to TWaveInMapper (class is using waveform-audio input device capable of recording the given format).