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Rockbox mail archiveSubject: Re: implementing an fft (fast fourier transform)Re: implementing an fft (fast fourier transform)
From: Linus Nielsen Feltzing <linus_at_haxx.se>
Date: Thu, 24 Apr 2003 14:19:09 +0200 Jaremy wrote: > I am currently developing a fast fourier transform (fft) for rockbox. > For those who do not know what a fft does, it transforms data about the > amplitude into information about the frequency spectrum. We can't read the D/A converter data fast enough to make use of an FFT for spectrum analysis. For a good analysis you would need to sample the data at about 40kHz. The best we can do is about (wild guess) 0.5kHz. And then Rockbox will slow to a crawl. My conclusion is: don't bother. Sorry if I sound pessimistic. /Linus Received on 2003-04-24 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |