Rémi Thébault wrote: > By the way, for the moment I use FFTW for the frequency identification. > Is there a way to identify a frequency with quite high precision without > computing a big spectrum analysis ?
You might want to look at the Goertzel algorithm (see a DSP book or http://en.wikipedia.org/wiki/Goertzel_algorithm). Note, this doesn't effect how big of a window you need to resolve a particular frequency. But, if you want to compute a big FFT, but will only be looking at a relatively small subset of the freq bins it outputs, then this can be more efficient. Ken _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
