[LAU] [Sort of OT] Ringing in filters

[Erik de Castro Lopo]

Mark Knecht wrote:

> Actually though, as a test of an idea I had and just because I've got
> the data here, I'm using stock market data,

I thnk thats part of your problem.

Stock market data is not zero mean. It has a DC offset plus it usually
has a long term upward trend.  The long term upward trend will look like
a large amount of low frequency energy.

If this filter really is for audio data, I really suggest you put audio
data through it.

Erik
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Erik de Castro Lopo
http://www.mega-nerd.com/