change the frequency component of a spectrum in an audio file I am working on an audio dynamic range compressor using Matlab.
After calculating the FFT of the audio file, I use several bandpass filters to amplify specific bands separately.
What I want to do then is remove components of a band and put them in another band.
for example, remove the components of the band 8khz-10khz and put them in the band 6khz-8khz.
would you please give me the general picture.
Judging by your question, it sounds like you are developing hearing aid solutions. Given that you are calculating an FFT and are now in the frequency domain, the easiest route forward is to use phase vocoder techniques to shift spectral peaks. Here is the original paper on this technique > http://505606.pbworks.com/f/LaroD99-pvoc.pdf