public MFCC(int samplePerFrame, int samplingRate, int numCepstra)
{
this.samplePerFrame = samplePerFrame;
this.samplingRate = samplingRate;
this.numCepstra = numCepstra;
upperFilterFreq = samplingRate / 2.0;
fft = new FFT();
dct = new DCT(this.numCepstra, numMelFilters);
}