# Audio delay calculator

### Give the tempo and the time signature

Express the length of the delay as fractions of a bar

Beats per minute
75BPM
Beats per bar
4 beats
Delay fraction
6/16 bar

Length of 1 beat
0.8 sec
1.25 Hz
Length of 1 bar
3.2 sec
0.313 Hz
Delay length
1.2 sec
0.833 Hz

### Repeated delays

A repeated delay syncs with the beat after 8 delays = 3 bars

1 reps
3/8
`1200 ms`
2 reps
3/4
`2.4 sec`
3 reps
9/8
`3.6 sec`
4 reps
3/2
`4.8 sec`
5 reps
15/8
`6 sec`
6 reps
9/4
`7.2 sec`
7 reps
21/8
`8.4 sec`
8 reps
3
`9.6 sec`

### Visualized

 1 bar 2 bars 3 bars 4 bars ♩ ♩ ♩ ♩
 1 2 3 4 5 6 7 8

If you have a 135 BPM song, and you want a phase modulation of 4 beats (1 bar): that is 1777.6 ms
If you have a 128 BPM song, and you want an audio delay of 2/3 of a beat: this is 312.5 ms

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