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Discussion Groups | Audio Signal Processing | c++ - ho to filter out frequency and all its harmonics?

Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).

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c++ - ho to filter out frequency and all its harmonics? - stud...@inbox.lv - Jan 8 7:48:08 2008

I have tried to use biquad filters but it eats a lot of cpu.
The filter bands should be very narrow with +/-5hz precision.
any help?

and also, can anybody post some ideas for fast and easy soft-clipping?

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Re: c++ - ho to filter out frequency and all its harmonics? - Amit - Jan 15 10:23:03 2008

Hi,

You can try out Comb Filters for removing harmonic content. You could design the comb filter(
single multiply feedback filter) with the filter delay based on the fundamental frequency and
gain factor based on the bandwidth. Try it and let me also know how well it works.

Regards,
Amit
----- Original Message ----
From: "s...@inbox.lv" <s...@inbox.lv>
To: a...@yahoogroups.com
Sent: Tuesday, 8 January, 2008 2:08:55 PM
Subject: [audiodsp] c++ - ho to filter out frequency and all its harmonics?

I have tried to use biquad filters but it eats a lot of cpu.
The filter bands should be very narrow with +/-5hz precision.
any help?

and also, can anybody post some ideas for fast and easy soft-clipping?