[Bass.Net] Создание звука с определенной частотой и воспроизведение через определенный аудиовыход

int sample=BASS_SampleCreate(256, 28160, 1, 1, BASS_SAMPLE_LOOP|BASS_SAMPLE_OVER_POS); // create sample
short data[128]; // data buffer
int a;
for (a=0; a<128; a++)
    data[a]=(short)(32767.0*sin((double)a*6.283185/64)); // sine wave
BASS_SampleSetData(sample, data); // set the sample's data

// the source stream
int streamA = Bass.BASS_StreamCreateFile(_fileName, 0, 0, BASSFlag.BASS_STREAM_DECODE);
// create a 4-channel mixer stream
BASS_CHANNELINFO i = Bass.BASS_ChannelGetInfo(streamA);
int mixer = BassMix.BASS_Mixer_StreamCreate(i.freq, 4, BASSFlag.BASS_DEFAULT );
// add the source stream to the mixer with the matrix option
BassMix.BASS_Mixer_StreamAddChannel(mixer, streamA, BASSFlag.BASS_MIXER_MATRIX);
// define a mixing matrix for the source stream
float[,] matrix = { // stereo to quad matrix
            {1, 0}, // left in = left front out
            {0, 1}, // right in = right front out
            {1, 0}, // left in = left rear out
            {0, 1}  // right in = right rear out
           };
// apply the matrix
BassMix.BASS_Mixer_ChannelSetMatrix(streamA, matrix);
// and play it
Bass.BASS_ChannelPlay(mixer, false);