[futurebasic] Re: >>> Sound Routines #2

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From: tedd <sperling@...>
Date: Mon, 24 Nov 1997 13:37:24 -0500

>I would record into a buffer in ram and examine the buffer and see how
>many times the samples cross the zero point for a given number of samples.
>Frequency is just cycles per second...  Knowing the sample rate, you could
>determine the frequency.

You would be right if you were dealing with a monochromatic (one frequency)
signal. However, a typical microphone signal is composed of numerous
frequencies. As such, IMHO, zero crossings tell you virtually nothing about
the frequencies of the signal. If I'm wrong, please educate me.

Also, you appear to be mixing terminology. The sample rate is different
than zero crossings.


tedd f. sperling                       <mailto:sperling@...>