120 BPM · quarter note
500
ms
Frequency 2 Hz
120 BPM quarter note — 500 ms
At 120 BPM a quarter note lasts 500 ms. One beat is 500 ms and a bar is 2000 ms.
- Tempo
- 120 BPM
- Note
- quarter note
- Length
- 500 ms
- Frequency
- 2 Hz
- One beat
- 500 ms
- One bar
- 2000 ms
- Per bar
- 4
Reverb and LFO use the same number
Set a reverb’s pre-delay and decay to these figures and the tail lands on the beat. LFOs are often dialled in hertz rather than milliseconds, so the table also gives 1,000 divided by the length — that is the rate to use for a tremolo or auto-pan locked to eighth notes.
Nearby cells
Same tempo, other notes
whole note
2000 ms0.5 Hz
half note
1000 ms1 Hz
quarter note
500 ms2 Hz
eighth note
250 ms4 Hz
sixteenth note
125 ms8 Hz
thirty-second note
62.5 ms16 Hz
dotted half
1500 ms0.667 Hz
dotted quarter
750 ms1.333 Hz
dotted eighth
375 ms2.667 Hz
quarter triplet
333.33 ms3 Hz
eighth triplet
166.67 ms6 Hz
sixteenth triplet
83.33 ms12 Hz
Same note, other tempos
60 BPM
1000 ms1 Hz
70 BPM
857.14 ms1.167 Hz
75 BPM
800 ms1.25 Hz
80 BPM
750 ms1.333 Hz
85 BPM
705.88 ms1.417 Hz
90 BPM
666.67 ms1.5 Hz
95 BPM
631.58 ms1.583 Hz
100 BPM
600 ms1.667 Hz
105 BPM
571.43 ms1.75 Hz
110 BPM
545.45 ms1.833 Hz
115 BPM
521.74 ms1.917 Hz
120 BPM
500 ms2 Hz
124 BPM
483.87 ms2.067 Hz
126 BPM
476.19 ms2.1 Hz
128 BPM
468.75 ms2.133 Hz
130 BPM
461.54 ms2.167 Hz
135 BPM
444.44 ms2.25 Hz
140 BPM
428.57 ms2.333 Hz
145 BPM
413.79 ms2.417 Hz
150 BPM
400 ms2.5 Hz
160 BPM
375 ms2.667 Hz
170 BPM
352.94 ms2.833 Hz
174 BPM
344.83 ms2.9 Hz
180 BPM
333.33 ms3 Hz
Worth knowing
- One beat is 60,000 divided by the tempo; every other note is a multiple of it.
- A dot adds half the value back; a triplet is two thirds.
- LFOs are often set in hertz rather than milliseconds, so that figure is here too.
- The bar figures assume a 4/4 time signature.
Common questions
Q. How many milliseconds is a quarter note at 120 BPM?
500 ms. One beat is 500 ms, and this length is a multiple of it.
Q. What rate do I give an LFO?
2 Hz — that is 1,000 divided by 500, the rate for a tremolo or auto-pan locked to this note.
Q. How many fit in a bar?
4, because a bar runs 2000 ms in 4/4.
Q. What is one step shorter?
A dotted eighth, which tightens the pattern.