/// <summary>
/// Creates a sample sequence used to demonstrate scope features.
/// </summary>
private SampleSequence CreateDemoSampleSequence(double duration, int sampleRate,
IInterpolator interpolator, int interpolatedSampleRate)
{
var values1 = FunctionValueGenerator.GenerateSineValuesForFrequency(1, sampleRate,
duration, (x, y) => y);
var values3 = FunctionValueGenerator.GenerateSineValuesForFrequency(3, sampleRate,
duration, (x, y) => y / 2);
var values = CollectionUtilities.Zip(
objects => ((double)objects[0]) + ((double)objects[1]),
values1,
values3);
if (interpolator != null)
{
values = interpolator.Interpolate(values, 0, duration,
sampleRate, interpolatedSampleRate);
sampleRate = interpolatedSampleRate;
}
// LogDeferredAccess shows us some details about how the values are accessed (see there).
return(new SampleSequence(1f / sampleRate, values));
//return new SampleSequence(1/sampleFrequency, LogDeferredAccess(values));
}
public static void GenerateWaveformFile(string outPath)
{
short channelsCount = 2;
int samplesPerSecond = 44100;
short bitsPerSample = 16;
var frequency = 440;
var durationInSeconds = 2;
var amplitude = 0.1;
var frames = FunctionValueGenerator
.GenerateSineValuesForFrequency(frequency, samplesPerSecond, durationInSeconds,
(x, y) =>
{
var samples = new [] { amplitude *y, amplitude *y };
return(new WaveForm16BitFrame(samples));
});
var format = new WaveformFormat(channelsCount, samplesPerSecond, bitsPerSample);
var waveForm = new MemoryWaveform(format, frames);
WriteWaveformFile(outPath, waveForm);
}
