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Subject: drum beat trigger

Date: 08/20/01 at 1:51 PM
Posted by: John
E-mail: hanger39@hotmail.com
Message Posted:

I am trying to make a circuit that can trigger a cmos device(processor i/p pin) from a drum beat (snare/bass) out of a audio sample...

The obvious choice to me was to pass it though a low pass filter (below 120hz) and then look for the peaks of the circuit by creating an average and feeding the un averaged signal and the averaged signal into a comparator. This sort of works but not very effective, it will also produce a pulse when ever there is a large change in volume on anything below the low pass filter also it does not pulse when there is a lot of bass in the signal. DOH!

Does anyone have any solutions that work reliably?

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