[music-dsp] FIR

[Bob Cain]

jaap wrote:

> Hi,
> 
> Does anyone knows how fast impulse responce using FFT works ?
> And does it have any disadvanteges in compare to normal impulse responce ?
> I want to use it for calculating a 3d echo.

I take it you are talking about applying an impulse response 
to a data stream.  In that case, fast convolution with the 
FFT using either overlapp add or overlap save will be much 
faster than the direct approach for IR's as long as needed 
for 3D echo's.  The drawback is latency for the FFT.


Bob
-- 

"Things should be described as simply as possible, but no 
simpler."

                                              A. Einstein