**Subject:** Re: SETI@home clients being built

**To:** None *<current-users@netbsd.org>*

**From:** Richard Todd *<rmtodd@servalan.servalan.com>*

**List:** current-users

**Date:** 06/19/1999 20:23:58
In servalan.mailinglist.netbsd-current-users you write:
>On Sun, Jun 20, 1999 at 07:03:18AM +0900, Izumi Tsutsui wrote:
>> Yes, it seems doing many FFTs.
>Hmm... I was always under the assumption that the FFT was by definition
>an optimized discrete Fourier transform, and thus no floating point was
>used.
You assume incorrectly. :-) "Discrete" in the DFT/FFT means that the frequency
and time spaces are discrete, not continuous, i.e. that you have a signal
sampled at fixed intervals and are interested in its frequency content at
fixed intervals in frequency space. The signal values themselves are almost
always floating-point.