[CM] telephone noise spectrum
Sun, 21 Mar 2004 13:25:50 +0100
On Fri, Mar 19, 2004 at 07:45:00PM -0800, Robert Komar wrote:
> Have you figured out what the frequency is? I was wondering if
> it was just a quiet version of the dial tone, which is a 440 Hz
> signal. I didn't make the suggestion right away because I thought
> that you would have tried notching that right away, it being
> fairly common knowledge that you can use the dial tone to tune
> a guitar.
Are you shure about that? If memory serves me right (it often doesn't,
i'm affraid :-) telephone dialing tones are only approximately 440 Hz ...
> Rob Komar
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