Posted by Carl Zwanzig on 04/05/07 21:44

P.C. Ford <meoh@mouse-potato.com> wrote:

>Ok, guys thanks for the quick replies. I have tried the notch filter
>and any progress seems subtle at best. Can't seem to find a "sweet
>spot" on frequency.

I'd be rather surprised if it's not an odd harmonic of 60 Hz, or a mix
of them.

Also, check out audacity for this, it has a nice set of filters and it's
free.

z!

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