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Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.

10 votes
4 answers
6k views

Complex conjugate and IFFT

I asked a question over on stack overflow. I'm having a slight problem however. As suggested by Paul R I am mirroring my lower $n/2$ bins into the upper $n/2$ bins. I have a few questions however. …
Goz's user avatar
  • 475
13 votes
4 answers
31k views

Efficiently calculating autocorrelation using FFTs

I'm trying to calculate an autocorrelation on a platform where the only accelerated primitive I have available is the (I)FFT. I'm having a problem though. I prototyped it in MATLAB. I am, however, sl …
Goz's user avatar
  • 475