But would a large-enough majority of songs be recorded with a multiple-of-5 BPM, that this app could presume the first record you play has a multiple-of-5 BPM, and be right 80+% of the time?
If so, then that could still be how it was done here. It wouldn't always work for the first record, but you'd be highly likely to get a "good reading" by at least the third one you try.
If so, then that could still be how it was done here. It wouldn't always work for the first record, but you'd be highly likely to get a "good reading" by at least the third one you try.