90 BPM in milliseconds
One beat at 90 BPM is 666.67 ms (60,000 ÷ 90). Below are the delay times for every note value, reverb settings that fit the groove and loop lengths in samples.
Delay times at 90 BPM
| Note | Straight (ms) | Dotted (ms) | Triplet (ms) | LFO (Hz) |
|---|---|---|---|---|
| 1/1 — Whole note | 2666.7 | 4000.0 | 1777.8 | 0.38 |
| 1/2 — Half note | 1333.3 | 2000.0 | 888.9 | 0.75 |
| 1/4 — Quarter note | 666.7 | 1000.0 | 444.4 | 1.50 |
| 1/8 — Eighth note | 333.3 | 500.0 | 222.2 | 3.00 |
| 1/16 — Sixteenth note | 166.7 | 250.0 | 111.1 | 6.00 |
| 1/32 — Thirty-second note | 83.3 | 125.0 | 55.6 | 12.00 |
| 1/64 — Sixty-fourth note | 41.7 | 62.5 | 27.8 | 24.00 |
Reverb pre-delay and decay
A 1/64-note pre-delay keeps the dry attack clear; decay times are set so pre-delay plus tail equals a musical length.
| Setting | Time |
|---|---|
| Pre-delay (1/64 note) | 41.7 ms |
| Short decay (half bar) | 1.29 s |
| Medium decay (1 bar) | 2.63 s |
| Long decay (2 bars) | 5.29 s |
Bars, phrases and samples
| Length | Seconds | Samples at 44.1 kHz | Samples at 48 kHz |
|---|---|---|---|
| 1 beat | 0.67 | 29,400 | 32,000 |
| 1 bar of 4/4 | 2.67 | 117,747 | 128,160 |
| 1 bar of 3/4 | 2.00 | 88,200 | 96,000 |
| 8 bars of 4/4 | 21.33 | 940,653 | 1,023,840 |
| 16 bars of 4/4 | 42.67 | 1,881,747 | 2,048,160 |
Where 90 BPM shows up
90 BPM is in the typical range of hip-hop, reggaeton, dancehall, lo-fi hip-hop. At double time (180 BPM) it matches drum & bass. The same delay settings work at 45 and 180 BPM by moving one note value: a quarter note here is an eighth at 180 BPM.
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Not sure your track is exactly 90? Check it with the BPM detector — it reports tempos to a tenth of a BPM.