Beat Rate Counter

[Mark Davidson]

>Hi Pianotech List Readers,
>
>Do any of you know of an electronic beat rate counter? I want to be able to 
>measure the beat rates of intervals. I think the faster intervals, 3rds, 6ths, 
>12ths, would be countable.
>
>Mark Krag RPT

You can figure out beat rates of fundamentals without too 
much trouble using any ETD that shows frequencies.

Frequency ratios of pure intervals are

5th 3:2
3rd 4:3
6th 9:8
12th 3:1

Example (5th):

A 440
E 659.25

Compare 659.25/3 and 440/2 (=219.75 and 220).
Difference, .25, is the beat rate.

-Mark Davidson