Back-of-napkin thoughts prompted by https://twitter.com/soapko/statuses/233009083446349825
Say the typical song is 120 BPM.
( 120BPM / 60s = 2 beats per second) * 3 seconds = 6 beats (quarter-notes)
Biggest assumption is that 6 beats in 3 seconds @ sixteenth note resolution = 24 available notes of resolution