[music-dsp] Measuring Impulse Response with multiple sine sweeps

Bob Cain arcane at arcanemethods.com
Tue Aug 31 19:04:20 EDT 2004



Angelo Farina wrote:

>>On 23 Aug 2004, at 10:59, Ed Wildgoose wrote:
>>
>>>Do you have any pointers on how to implement a "swept" band pass 
>>>filter?  I can get my head around a static on, but not a swept band 
>>>pass?  Do you just use smallish ffft windows and gradually increase 
>>>the parameters in small steps (ie not completely smooth)?
>>>
>>
>>Yeah. It's as good an approach as any; trying to implement 
>>actual smooth-moving filters is too much work; time-variant 
>>filters are really dangerous things!
> 
> 
> In one of my Aurora plugins (Cross Functions), the above-described approach
> is already available: You can perform a cross-correlation between two
> channels, and have a following band-pass filter applied with a different
> center frequency for each FFT block.

Angelo, Cross Functions looks like it could be very useful. 
  Could you describe what the parameters in it mean in 
enough detail to find out?


ob
-- 

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

                                              A. Einstein



More information about the music-dsp mailing list