On Sat, 24 Mar 2007 23:10:08 +0100, Florent THIERY <[EMAIL PROTECTED]>
wrote:
Otherwise analog ones are possible, starting from the very basic RLC
filter:
http://www.everything2.com/index.pl?node_id=1391618&lastnode_id=0
Yup, i was thinking of a basic RLC filter... But a software one will
be easier to do (more unobtrusive at least)
Do you think we can use audacity's nyquist libs?
http://www.audacity-forum.de/download/edgar/nyquist/nyquist-doc/manual/part12.html
As the microphone signal always end up on the computer, software filtering
is the solution to go. A passive RLC filter won't be steep enough to only
cut a narrow band of 500Hz and the AVR won't be able to help as its
processing power is way too little for digital signal filtering.
The audacity noise remaoval function works great, you first create a
profile from a sample of noise only. Then you use that profile to remove
the noise an your signal. I don't know if that function is in the nyquist
library but that's certainly the one that will give better results.
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