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Custom FIR Filter Implementation, TOS #8 / trolling example
tkrieger
post Jul 20 2004, 20:51
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Is there a way to either alter the coefficients of an existing FIR filter or design a new FIR filter, which can be used to convolve with the raw CD data in real time?? I would be interested in trying a Lanczos filter, which works great with image files- I'm very curious to see if such implementation would also work with audio playback.

Responses are appreciated!!

Todd
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SebastianG
post Jul 20 2004, 22:35
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QUOTE (tkrieger @ Jul 20 2004, 11:51 AM)
Is there a way to either alter the coefficients of an existing FIR filter or design a new FIR filter, which can be used to convolve with the raw CD data in real time??  I would be interested in trying a Lanczos filter, which works great with image files- I'm very curious to see if such implementation would also work with audio playback.

Responses are appreciated!!

Todd
*


I'm pretty sure it can be done via Foobar2000 - get a CDDA reading plugin and the convolver plugin. The convolver plugin loads a certain impulse response (wave file) and uses it for convolution.

But...
What's your goal ?
Lanczos is AFAIK for interpolation / resampling.
It's probably less useful for audio.
Better do "sinc interpolation"

Funny thing: I'm currently working on a real-time-convolver in Java

bye,
Sebi

This post has been edited by SebastianG: Jul 20 2004, 22:38
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