Quote:
Originally Posted by Tale
FFT uses linear scale throughout its entire range, and AFAIK there is no way around that...

Yep.
But "FFT" = "Fast digital Fourier Transform" only is "faster" if there is a great number of sample / frequencies to be handled. (Order n*log(n) instead of n^2.)
If wanting to detect the Power of just a few frequencies in rather short snippets (and hence low exactness), other means might be usable more effectively.
Michael