Appendix C
Delay time chart

Delay times can be easily calculated. For time signatures involving quarter-note beats (4/4, 3/4, etc.), a quarter-note delay in seconds is calculated using 60 / bpm. For example, at 120 bpm, a quarter-note delay would be 60 / 120, or 0.5 seconds, which is 500 ms. Milliseconds are far more common in delay units: using the calculation 60,000 / bpm would give the result in milliseconds. A half-note delay is twice as long as a quarter-note delay for the same bpm, and an eighth-note delay is half the quarter-note delay. For example, a half-note delay at 120 bpm would be 1,000 ms, and an eighth-note delay would be 250 ms.

Simple note values

The following table includes delay times for various simple note values at 80–190 bpm. For faster bpm figures, simply halve the delay time of half the destination bpm. For example, a quarter-note delay at 240 bpm is 250 ms (half of 500 ms). For slower bpm figures, simply double the delay time of twice the destination bpm. For example, a quarter-note delay in 60 bpm is 1,000 ms (twice 500 ms). The delay time of a whole note in common time (4.4) is also the length of each bar.

Triplets

To calculate the delay time of a triplet note, simply multiply the delay time of the simple note value by 2/3 (0.6667). The following chart displays the delay times for triplet delays.

Dotted notes

A dotted note duration is calculated by adding half of the note duration to the full note duration. So to calculate the delay time of a dotted note, all we need to do is multiply the delay time of the simple note value by 1.5. The following chart displays the delay time for dotted note delays.