scott wrote:
>>  (Btw, did you know that even if a sound signal has only one single
>> frequency, a discrete fourier transform is usually completely unable
>> to find that single frequency, and instead will find a large (potentially
>> infinite) amount of frequencies around that real frequency?)
> 
> It just depends how many samples you use for your fourier transform, the 
> more samples you take, the more accurately you can divide up the 
> frequency spectrum.  If you have a couple of seconds of normal audio 
> recording (so like 100k samples), you should be able to find a single 
> frequency pretty accurately, certainly to within 1 Hz.

IIRC, there's a version of the Fourier transform from a discrete time 
domain to a continuous frequency domain. Anybody know details?

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