[sdiy] acquisition and RFI

[Seb Francis]

Or if you use Windows/VST then NI Spektral Delay will do exactly this ..

http://www.nativeinstruments.de/index.php?id=spektraldelay_us

"The NI-SPEKTRAL DELAY differs from the many other audio effects in that 
it uses real-time FFT (Fast Fourier Transformation) to split each 
channel of a stereo signal into as many as 160 separately modifiable 
frequency bands (even up to 1024 bands internally). The level, delay 
time and feedback amount for each of this bands can be set separately. 
Additionally, various modulation effects can be applied to the signal in 
the frequency domain, which allows for even further sound manipulation."

Not free though :-(

Seb



Aaron Bader wrote:

>On Fri, 29 Jul 2005 00:30:15 +1000
>"Paul Perry" <pfperry at melbpc.org.au> wrote:
>
>  
>
>>Personally, I've always wanted a delay that had a different delay period,
>>for each
>>frequency (that is to say, for example, no delay at 20Hz and then gradually
>>increasing to
>>250 milliseconds at 20KHz).
>>    
>>
>
>I'm not sure if this is on the level of precision that you are looking
>for, and it requires a fairly odd platform (Linux/JACK) to run, but my
>trusty old Duron can handle 2 channels at 88200 hertz of pretty much
>that just fine in real time. Didn't use too much ram.
>
>http://freqtweak.sourceforge.net/
>
>Not quite what to do with that soundcard/dsp, but fun in it's own way.
>I'm a fan of the 'warp' filter.
>
>  
>