BPM to delay time calculator
A delay that lines up with the tempo disappears into the groove. One that does not sounds like a mistake.
Delay time
500.000ms
- Dotted
- 750.000 ms
- Triplet
- 333.333 ms
- As a frequency
- 2.0000 Hz
- Suggested reverb pre-delay
- 125.00 ms
- One bar
- 2000.00 ms
- Loop length
- 8.0000 s
- Delay in samples at 48 kHz
- 24 000
Show the working
- Tempo = 120
- Note division = 1
- Bars for a loop = 4
- Beats per bar = 4
- quarter_ms = 60000 / 120 = 500
- Delay time = 500 * 1 = 500
- Dotted = 500 * 1.5 = 750
- Triplet = 500 * 2/3 = 333.333
- As a frequency = 500 > 0 ? 1000/500 : 0 = 2
- One bar = 500 * 4 = 2000
- loop_ms = 2000 * 4 = 8000
- Loop length = 8000 / 1000 = 8
- Suggested reverb pre-delay = 500 / 4 = 125
- Delay in samples at 48 kHz = 500 * 48 = 24 000
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
Scenarios & local history
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The formula
- quarter note in ms = 60 000 / BPM
- dotted = x1.5, triplet = x2/3
A delay time of 25 ms or less stops being heard as an echo and starts being heard as comb filtering.