Reverb Calculator
The decay is this length minus the pre-delay, so the tail dies where the next note of that length lands.
Pre-delay
62.5ms
Decay
937.5ms
Total reverb time
1,000.0ms
The preview plays a drum hit through a plain reverb built from these times, then a second hit where the tail ends; the lines mark the beats. It never touches your own audio.
Note lengths at this tempo
120 BPM| Note value | Straight | Dotted | Triplet |
|---|---|---|---|
| 1/1 | 2,000.0ms0.5 Hz | 3,000.0ms0.33 Hz | 1,333.3ms0.75 Hz |
| 1/2 | 1,000.0ms1 Hz | 1,500.0ms0.67 Hz | 666.7ms1.5 Hz |
| 1/4 | 500.0ms2 Hz | 750.0ms1.33 Hz | 333.3ms3 Hz |
| 1/8 | 250.0ms4 Hz | 375.0ms2.67 Hz | 166.7ms6 Hz |
| 1/16 | 125.0ms8 Hz | 187.5ms5.33 Hz | 83.3ms12 Hz |
| 1/32 | 62.5ms16 Hz | 93.8ms10.67 Hz | 41.7ms24 Hz |
| 1/64 | 31.3ms32 Hz | 46.9ms21.33 Hz | 20.8ms48 Hz |
| 1/128 | 15.6ms64 Hz | 23.4ms42.67 Hz | 10.4ms96 Hz |
A reverb calculator that works from your tempo
A reverb time is a musical length, not a number pulled from a preset. Set the tempo once and the calculator turns every note value into milliseconds, so a pre-delay or a decay can be chosen by ear and written down exactly.
Every note length in milliseconds
At one tempo the calculator lists a whole note down to a 1/128, so a reverb time can be set to a musical value instead of a round number.
Straight, dotted and triplet readings
Each note value is shown three ways, so a dotted delay or a triplet tail is read off the table rather than worked out by hand.
A decay that ends on the beat
Pick the length the reverb should fill, from a 1/8 to two bars, and a pre-delay. The calculator takes one from the other, so the tail dies where the next note of that length lands.
How it works
Set a reverb time in three steps
Enter the tempo
Type the tempo of the track, and every note value on the page is recalculated at that tempo.
Choose the reverb length and a pre-delay
Pick how long the whole reverb should last and how long it waits before it starts. A short pre-delay keeps the reverb clear of the words; a longer length lets the tail bloom.
Hear it, then copy the number
Play the preview to hear the tail run into a second hit, then copy the pre-delay, the decay or the total your reverb asks for.
Tempo, note values and milliseconds
The tempo range the calculator accepts, stepped one beat per minute at a time.
From a whole note down to a 1/128, each one listed at the tempo you set.
Every note value is shown straight, dotted and as a triplet, so no reading has to be estimated.
From a 1/8 note to two bars of 4/4, each split into a pre-delay and a decay. Every pre-delay is shorter than the shortest length, so the decay never runs out.
Who reaches for a reverb calculator
Mixers setting a reverb time
Work out a pre-delay and a decay that sit inside the tempo of the track instead of guessing at the numbers.
Producers matching a delay to the beat
A delay that follows a note value stays in time with the music, and the table gives that value for every note length at your tempo.
Students learning what note values are worth
Read a dotted note or a triplet in milliseconds to see how the note values relate to one another at a single tempo.
Reverb Calculator FAQ
Put these times into a mix
Take the pre-delay and decay you settled on into the editor, or slow a track down and hear the space change.