Wow - handbags at dawn girls!
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Bunny please - I assure you there are no turkeys chez GrahamN (other than that Berlioz Te Deum CDOriginally posted by merlin
Indeed I'm not you old Jive Turkey! I think it's a term Ian might use.

Still not entirely sure what you're aiming to prove/examine here, but you should see the beat as peaks in the envelope of a time domain 'scope display. If it's a repetitive signal a simple triggered scope will do, and just measure the time difference between the two cursors (any half decent scope will do this). If it's a non-repetitive signal, you'd need a sampling scope or similar transient capture ADC-based system, at which point you can analyse to your hearts content. Actually you should be able to do that with your TACT laptop software. Then either make the same measurement in the in the time domain (between neighbouring amplitude maxima), and the frequency is 1/(time difference), or display in the frequency domain. That display will show one peak for each distinct frequency present in your sample - beats/intereference tones will arise at every difference between those frequencies. Those that we recognise as beats will be due to very closely spaced peaks in the spectrum (i.e. less than say 15 Hz apart). E.g. two peaks at 252Hz and 254Hz will give a 2Hz beat. If you're interested in absolute pitch, "A" above middle-C is defined as 440Hz, frequency halves each octave you go down from there, and each semitone is a frequency ratio of 2^(1/12).What I am trying to understand, and forgive me here but my knowledge is somewhat limited, is that ,given the presence of a beat when playing two disparate frequencies, and the perception for the listener of that beat, is there any way of identifying the frequency of the beat by using say a spectral analyser, or are we just reliant on a mathamatical process to be able to define the perceived pitch?