私がやろうとしているのは、いくつかの曲から周波数を取得し、人間の声域または一般的な範囲に現れないすべての周波数を抑制することです. これが私の抑制機能です。
public void SupressAndWrite(Func<FrequencyUnit, bool> func)
{
this.WaveManipulated = true;
while (this.mainWave.WAVFile.NumSamplesRemaining > 0)
{
FrequencyUnit[] freqUnits = this.mainWave.NextFrequencyUnits();
Complex[] compUnits = (from item
in freqUnits
select (func(item)
? new Complex(item.Frequency, 0) :Complex.Zero))
.ToArray();
FourierTransform.FFT(compUnits, FourierTransform.Direction.Backward);
short[] shorts = (from item
in compUnits
select (short)item.Real).ToArray();
foreach (short item in shorts)
{
this.ManipulatedFile.AddSample16bit(item);
}
}
this.ManipulatedFile.Close();
}
これが私のウェーブのクラスです。
public sealed class ComplexWave
{
public readonly WAVFile WAVFile;
public readonly Int32 SampleSize;
private FourierTransform.Direction fourierDirection { get; set; }
private long position;
/// <param name="file"></param>
/// <param name="sampleSize in BLOCKS"></param>
public ComplexWave(WAVFile file, int sampleSize)
{
file.NullReferenceExceptionCheck();
this.WAVFile = file;
this.SampleSize = sampleSize;
if (this.SampleSize % 8 != 0)
{
if (this.SampleSize % 16 != 0)
{
throw new ArgumentException("Sample Size");
}
}
if (!MathTools.IsPowerOf2(sampleSize))
{
throw new ArgumentException("Sample Size");
}
this.fourierDirection = FourierTransform.Direction.Forward;
}
public Complex[] NextSampleFourierTransform()
{
short[] newInput = this.GetNextSample();
Complex[] data = newInput.CopyToComplex();
if (newInput.Any((x) => x != 0))
{
Debug.Write("done");
}
FourierTransform.FFT(data, this.fourierDirection);
return data;
}
public FrequencyUnit[] NextFrequencyUnits()
{
Complex[] cm = this.NextSampleFourierTransform();
FrequencyUnit[] freqUn = new FrequencyUnit[(cm.Length / 2)];
int max = (cm.Length / 2);
for (int i = 0; i < max; i++)
{
freqUn[i] = new FrequencyUnit(cm[i], this.WAVFile.SampleRateHz, i, cm.Length);
}
Array.Sort(freqUn);
return freqUn;
}
private short[] GetNextSample()
{
short[] retval = new short[this.SampleSize];
for (int i = 0; i < this.SampleSize; i++)
{
if (this.WAVFile.NumSamplesRemaining > 0)
{
retval[i] = this.WAVFile.GetNextSampleAs16Bit();
this.position++;
}
}
return retval;
}
}
FFT フォワードと FFT バックワードの両方が正しく機能します。私のエラーが何であるか教えてください。