/// <summary>
/// Initializes a new instance of the <see cref="BiQuadFilter"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="parameter">The parameter.</param>
/// <exception cref="ArgumentNullException">source</exception>
public BiQuadFilter(IReadableAudioSource <float, SampleFormat> source, BiQuadParameter parameter)
{
Source = source ?? throw new ArgumentNullException(nameof(source));
Parameter = parameter;
internalStates = new Vector2[Format.Channels];
internalStates.AsSpan().Fill(new Vector2(0, 0));
}
/// <summary>
/// Initializes a new instance of the <see cref="SplineResampler"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="destinationSampleRate">The destination sample rate.</param>
public SplineResampler(IReadableAudioSource <float, SampleFormat> source, int destinationSampleRate) :
base(source.Format.SampleRate > destinationSampleRate
? new BiQuadFilter(source, BiQuadParameter.CreateLPFParameter(source.Format.SampleRate, destinationSampleRate * 0.5, 0.70710678118654752440084436210485))
: source, destinationSampleRate)
{
bufferWrapper = new ResizablePooledBufferWrapper <float>(1);
}
/// <summary>
/// Initializes a new instance of the <see cref="SampleToPCM8Converter"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="accuracyNeeded">Turns on <see cref="AccuracyMode"/> when <c>true</c>.</param>
public SampleToPCM8Converter(IReadableAudioSource <float, SampleFormat> source, bool accuracyNeeded = true)
: base(source, new WaveFormat(source.Format.SampleRate, 8, source.Format.Channels, AudioEncoding.Pcm))
{
if (accuracyNeeded)
{
dsmAccumulator = new float[source.Format.Channels];
dsmLastOutput = new byte[source.Format.Channels];
}
AccuracyMode = accuracyNeeded;
readBuffer = new float[ActualBufferMax];
}
/// <summary>
/// Initializes a new instance of the <see cref="SampleToPcm24Converter"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="accuracyNeeded">Turns on <see cref="AccuracyMode"/> when <c>true</c>.</param>
/// <param name="endianness">The destination endianness.</param>
public SampleToPcm24Converter(IReadableAudioSource <float, SampleFormat> source, bool accuracyNeeded = true, Endianness endianness = Endianness.Little)
: base(source, new WaveFormat(source.Format.SampleRate, 24, source.Format.Channels, AudioEncoding.Pcm))
{
if (accuracyNeeded)
{
dsmAccumulator = new float[source.Format.Channels];
dsmLastOutput = new Int24[source.Format.Channels];
}
AccuracyMode = accuracyNeeded;
Endianness = endianness;
readBuffer = new float[ActualBufferMax];
}
public ReverbEffect(WaveFormat waveFormat, Scalar.Scalar decay, Scalar.Scalar delay, int max_buffer_len, IReadableAudioSource <float> source) : base(waveFormat)
{
Source = source;
Decay = decay;
Delay = delay;
if (max_buffer_len < 0 || max_buffer_len > waveFormat.SampleRate)
{
throw new ArgumentOutOfRangeException("max_buffer_len must be greater than zero and cannot exceed the samples per second of the provided WaveFormat");
}
_buffer = new float[max_buffer_len];
_buffer_index = 0;
}
/// <summary>
/// Initializes a new instance of the <see cref="ResamplerBase"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="destinationSampleRate">The destination sample rate.</param>
/// <exception cref="ArgumentNullException">source</exception>
/// <exception cref="ArgumentOutOfRangeException">destinationSampleRate</exception>
protected ResamplerBase(IReadableAudioSource <float, SampleFormat> source, int destinationSampleRate)
{
Source = source ?? throw new ArgumentNullException(nameof(source));
Format = new SampleFormat(source.Format.Channels, destinationSampleRate);
if (destinationSampleRate < 1)
{
throw new ArgumentOutOfRangeException(nameof(destinationSampleRate), $"{nameof(destinationSampleRate)} must be grater than 0!");
}
(RateMul, RateDiv) = MathHelper.MinimizeDivisor(destinationSampleRate, source.Format.SampleRate);
RateMulInverse = 1.0f / RateMul;
RateDivInverse = 1.0f / RateDiv;
}
/// <summary>
/// Initializes a new instance of the <see cref="Pcm16ToSampleConverter"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="endianness">The endianness of <paramref name="source"/>.</param>
public Pcm24ToSampleConverter(IReadableAudioSource <byte, IWaveFormat> source, Endianness endianness = Endianness.Little)
: base(source, new SampleFormat(source.Format.SampleRate, source.Format.Channels))
{
Endianness = endianness;
}
/// <summary>
/// Initializes a new instance of the <see cref="Pcm8ToSampleConverter"/> class.
/// </summary>
/// <param name="source">The source.</param>
public Pcm8ToSampleConverter(IReadableAudioSource <byte, IWaveFormat> source)
: base(source, new SampleFormat(source.Format.SampleRate, source.Format.Channels))
{
}
static void Main(string[] args)
{
WaveFormat waveFormat = new WaveFormat(44100, 16, 1);
Oscillator freqOsc = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(0.1f), new ConstantScalar(80.0f), new ConstantScalar(0), new ConstantScalar(100.0f));
Oscillator ampOscVel = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(0.05f), new ConstantScalar(8.0f), new ConstantScalar(0.5f), new ConstantScalar(8.0f));
Oscillator ampOsc = new Oscillator(Oscillator.WaveType.SawtoothWave, waveFormat.SampleRate, ampOscVel, new ConstantScalar(0.5f), new ConstantScalar(0), new ConstantScalar(1.1f));
Oscillator variableFreq = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, freqOsc, ampOsc, new ConstantScalar(0), new ConstantScalar(0));
ScalarPassthrough scalarPassthru = new ScalarPassthrough(waveFormat, variableFreq);
NoiseGenerator noiseGen = new NoiseGenerator(waveFormat, NoiseGenerator.NoiseType.WhiteNoise);
Oscillator freqsweep = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(0.1f), new ConstantScalar(200), new ConstantScalar(0), new ConstantScalar(440));
Oscillator qsweep = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(1.0f), new ConstantScalar(0.9f), new ConstantScalar(0), new ConstantScalar(1.0f)); //new ConstantScalar((float)(1.0 / Math.Sqrt(2)));
//Oscillator gainSweep = new Oscillator(Oscillator.WaveType.TriangleWave, waveFormat.SampleRate, new ConstantScalar(0.025f), new ConstantScalar(2), new ConstantScalar(0), new ConstantScalar(6));
ConstantScalar gainSweep = new ConstantScalar(6);
SampleProcessor.SampleProcessor filter = new SampleProcessor.NotchFilter(waveFormat, freqsweep, qsweep, gainSweep, scalarPassthru);
// distortion "pedal" on a minimally modified hard body electric guitar signal
Oscillator gainOsc = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(0.5f), new ConstantScalar(2), new ConstantScalar(0), new ConstantScalar(5));
Oscillator cutoffOsc = new Oscillator(Oscillator.WaveType.SineWave, waveFormat.SampleRate, new ConstantScalar(0.95f), new ConstantScalar(3), new ConstantScalar(0), new ConstantScalar(4));
ConstantScalar cutoff = new ConstantScalar(0.2f);
IWaveSource cleanguitar = CodecFactory.Instance.GetCodec(@"..\..\sampledata\guitar-sample.mp3"); // sample signal from single-pickup electric guitar. Recorded 8/14/20.
IReadableAudioSource <float> convertedguitar = cleanguitar.ToMono().ToSampleSource();
SampleProcessor.DistortionEffect distortion = new SampleProcessor.DistortionEffect(waveFormat, gainOsc, cutoff, convertedguitar);
SampleProcessor.SampleProcessor reverbEffect = new SampleProcessor.ReverbEffect(waveFormat, new ConstantScalar(0.4f), new ConstantScalar(0.5f), waveFormat.SampleRate, distortion);
BasicAudioController basicAudioController = new BasicAudioController(GetSoundOut(), 1, 44100);
basicAudioController.addSource((ISampleSource)reverbEffect);
basicAudioController.startPlaying();
Console.ReadKey();
basicAudioController.stopPlaying();
return;
MIDI.MIDIData data = MIDI.MIDIFileReader.readFile(@"..\..\sampledata\MIDI_sample.mid");
MIDI.MIDIData testdata = new MIDI.MIDIData();
testdata.format = 0;
testdata.timing = MIDI.TimingScheme.TimeCode;
testdata.timecode_fps = 24;
testdata.timecode_sfr = 4;
testdata.ntracks = 1;
testdata.tracks.Add(new MIDI.MIDITrack());
MIDI.MIDIEvent event0 = new MIDI.MIDIEvent();
MIDI.MIDIEvent event1 = new MIDI.MIDIEvent();
event0.delta = 4 * 24 * 5; // wait 5 seconds from start
event1.delta = 4 * 24 * 2; // 2 seconds
//event0.type = MIDI.EventType.MIDIEvent;
//event0.midieventtype = MIDI.MIDIEventType.NoteOn;
//event0.val1 = 0; // channel 0
//event0.val2 = 60; // middle C
//event0.val3 = 1;
//event1.type = MIDI.EventType.MIDIEvent;
//event1.midieventtype = MIDI.MIDIEventType.NoteOff;
//event1.val1 = 0; // channel 0
//event1.val2 = 60; // middle C
//event1.val3 = 1;
//testdata.tracks[0].events.Add(event0);
//testdata.tracks[0].events.Add(event1);
MIDI.MIDIPlayer player = new MIDI.MIDIPlayer(data);
Console.WriteLine("Track 1 events:");
player.playTrack(1);
Console.ReadKey();
return;
MIDIAudioController audioController = new MIDIAudioController(GetSoundOut());
ChromaticScale.ChromaticScale scale = new ChromaticScale.ChromaticScale();
audioController.startPlaying();
SampleSource.WaveGenerator.WaveType wavetype = WaveGenerator.WaveType.SineWave;
Console.ReadKey(); // wait for input
for (int i = 0; i < scale.notes.Count(); i++)
{
float freq = scale.notes[i].base_freq / 2;
Console.WriteLine(scale.notes[i].identifier[0] + " - " + freq + " - " + wavetype);
audioController.updatePlaying(freq, wavetype);
Console.ReadKey(); // wait for input
wavetype = Next(wavetype);
}
for (int i = 0; i < scale.notes.Count(); i++)
{
Console.WriteLine(scale.notes[i].identifier[0] + " - " + scale.notes[i].base_freq.ToString() + " - " + wavetype);
audioController.updatePlaying(scale.notes[i].base_freq, wavetype);
Console.ReadKey(); // wait for input
wavetype = Next(wavetype);
}
for (int i = 0; i < scale.notes.Count(); i++)
{
float freq = scale.notes[i].base_freq * 2;
Console.WriteLine(scale.notes[i].identifier[0] + " - " + freq + " - " + wavetype);
audioController.updatePlaying(freq, wavetype);
Console.ReadKey(); // wait for input
wavetype = Next(wavetype);
}
audioController.stopPlaying();
audioController.Dispose();
}
public VolumeModulator(WaveFormat waveformat, IReadableAudioSource <float> source, Scalar.Scalar scalar) : base(waveformat)
{
this.scalar = scalar;
this.source = source;
}
public DistortionEffect(WaveFormat waveFormat, Scalar.Scalar gain, Scalar.Scalar cutoff, IReadableAudioSource <float> source) : base(waveFormat)
{
Source = source;
Gain = gain;
Cutoff = cutoff;
}
/// <summary>
/// Initializes a new instance of the <see cref="SampleToFloat32Converter"/> class.
/// </summary>
/// <param name="source">The source.</param>
public SampleToFloat32Converter(IReadableAudioSource <float, SampleFormat> source)
: base(source, new WaveFormat(source.Format.SampleRate, 32, source.Format.Channels, AudioEncoding.IeeeFloat))
{
}
/// <summary>
/// Create a new audio source.
/// </summary>
/// <param name="source">Audio source.</param>
/// <param name="loop">Loop information.</param>
public AudioSource(IReadableAudioSource <byte> source, Loop loop = null)
{
IsLinux = false;
AudioSourceWindows = source;
Loop = loop;
}
