public BasicAudioController(ISoundOut programSoundOut, int channels, int sampleRate)
{
mixer = new SoundMixer(channels, sampleRate)
{
FillWithZeros = true,
DivideResult = true
};
monoToStereoChannelMatrix = new ChannelMatrix(ChannelMask.SpeakerFrontCenter, ChannelMask.SpeakerFrontLeft | ChannelMask.SpeakerFrontRight);
monoToStereoChannelMatrix.SetMatrix(
new[, ]
{
{ 1.0f, 1.0f }
});
soundOut = programSoundOut;
}
public MIDIAudioController(ISoundOut programSoundOut)
{
frequencies = new List <double>();
mixer = new SoundMixer(2, sampleRate)
{
FillWithZeros = true,
DivideResult = true
};
monoToStereoChannelMatrix = new ChannelMatrix(ChannelMask.SpeakerFrontCenter, ChannelMask.SpeakerFrontLeft | ChannelMask.SpeakerFrontRight);
monoToStereoChannelMatrix.SetMatrix(
new[, ]
{
{ 1.0f, 1.0f }
});
soundOut = programSoundOut;
midiKeys = new List <MidiKeyPlaying>();
}
static void Main(string[] args)
{
Console.WriteLine(
"This example will mix one audio file with \n" +
"two sine waves (300Hz and 700Hz).\n" +
"The 300Hz sine wave will play only on the right\n" +
"channel and the 700Hz sine wave only on the left channel." +
"\n\n\nPlease select the audio file!\n"
);
IWaveSource fileWaveSource = null;
do
{
OpenFileDialog openFileDialog = new OpenFileDialog()
{
Title = "Select any file to mix into",
Filter = CodecFactory.SupportedFilesFilterEn
};
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
try
{
fileWaveSource = CodecFactory.Instance.GetCodec(openFileDialog.FileName);
}
catch
{
}
}
} while (fileWaveSource == null);
const int mixerSampleRate = 44100; //44.1kHz
var mixer = new SimpleMixer(2, mixerSampleRate) //output: stereo, 44,1kHz
{
FillWithZeros = true,
DivideResult = true //you may play around with this
};
var monoToLeftOnlyChannelMatrix = new ChannelMatrix(ChannelMask.SpeakerFrontCenter,
ChannelMask.SpeakerFrontLeft | ChannelMask.SpeakerFrontRight);
var monoToRightOnlyChannelMatrix = new ChannelMatrix(ChannelMask.SpeakerFrontCenter,
ChannelMask.SpeakerFrontLeft | ChannelMask.SpeakerFrontRight);
/*
* Set the channel conversion matrix.
* The y-axis specifies the input. This in only one channel since the SineGenerator only uses one channel.
* The x-axis specifies the output. There we have to use two channels since we want stereo output.
* The first value on the x-axis specifies the volume of the left channel, the second value
* on the x-axis specifies the volume of the right channel.
*
* If we take look at the left only channel conversion matrix, we can see that we are mapping one channel (y-axis)
* to two channels (x-axis). The left channel receives a volume of 1.0 (which means 100%) and the right channel
* receives a volume of 0.0 (which means 0.0% -> muted).
*/
monoToLeftOnlyChannelMatrix.SetMatrix(
new[, ]
{
{ 1.0f, 0.0f }
});
monoToRightOnlyChannelMatrix.SetMatrix(
new[, ]
{
{ 0.0f, 1.0f }
});
VolumeSource volumeSource1, volumeSource2;
//Add any sound track.
mixer.AddSource(
fileWaveSource
.ChangeSampleRate(mixerSampleRate)
.ToStereo()
.ToSampleSource());
//Add a 700Hz sine with a amplitude of 0.5 which plays only on the left channel.
mixer.AddSource(
new SineGenerator(700, 0.5, 0).ToWaveSource()
.AppendSource(x => new DmoChannelResampler(x, monoToLeftOnlyChannelMatrix, mixerSampleRate))
.AppendSource(x => new VolumeSource(x.ToSampleSource()), out volumeSource1));
//Add a 300Hz sine with a amplitude of 0.5 which plays only on the right channel.
mixer.AddSource(
new SineGenerator(300, 0.5, 0).ToWaveSource()
.AppendSource(x => new DmoChannelResampler(x, monoToRightOnlyChannelMatrix, mixerSampleRate))
.AppendSource(x => new VolumeSource(x.ToSampleSource()), out volumeSource2));
//Initialize the soundout with the mixer.
var soundOut = new WasapiOut()
{
Latency = 200
}; //better use a quite high latency
soundOut.Initialize(mixer.ToWaveSource());
soundOut.Play();
//adjust the volume of the input signals (default value is 100%):
volumeSource1.Volume = 0.5f; //set the volume of the 700Hz sine to 50%
volumeSource2.Volume = 0.7f; //set the volume of the 300Hz sine to 70%
Console.ReadKey();
mixer.Dispose();
soundOut.Dispose();
}
