Hi users, I am writting a program to extract audio features but the autoCorr, xCorr always give me a 0 value. ZeroX always give me 0.5 value. This is a brief of the source code: //Definitions for features extraction adc => FFT fft =^ RMS rms => blackhole; fft =^ RollOff rolloff => blackhole; fft =^ Centroid centroid => blackhole; fft =^ Flux flux => blackhole; fft =^ ZeroX zerox => blackhole; adc => AutoCorr autoCorr => blackhole; fft =^ XCorr xCorr => blackhole; //Feauture extraction fft.upchuck() @=> UAnaBlob blobFFT; rms.upchuck() @=> UAnaBlob blobRMS; (blobRMS.fval(0) * 100000) => volumenInst; rolloff.upchuck() @=> UAnaBlob blobRollOff; (blobRollOff.fval(0)*srate )/2 => rollOffInst ; centroid.upchuck() @=> UAnaBlob blobCentroid; (blobCentroid.fval(0)*srate)/2=> centroideInst; flux.upchuck() @=> UAnaBlob blobFlux; blobFlux.fval(0) => similitudInst; zerox.upchuck() @=> UAnaBlob blobZeroX; blobZeroX.fval(0) => zeroXInst; ///<----------- xCorr.upchuck() @=> UAnaBlob blobxCorr; blobxCorr.fval(0) => correlacionCruzadaInst; ///<----------- autoCorr.upchuck() @=> UAnaBlob blobAutocorrelacion; blobAutocorrelacion.fval(0) => autocorrelacionInst; ///<----------- Kindy Regards. -- Fernando Alonso Martín Lualobus@gmail.com http://roboticnaturalinteraction.comhttp://www.roboticNaturalInteraction.com/famartin.html