Hall Reverb Calculator
Hall reverb puts a performance inside a large, reflective space — and it carries the longest tails of any reverb type. Enter your tempo above to get pre-delay, decay and total times for four hall presets, from a tight club hall to a full cathedral, all locked to the beat.
| Preset | Pre-Delay | Decay Time | Total |
|---|---|---|---|
| Concert Hall2 bars total | 62.5 ms | 3937.5 ms | 4000 ms |
| Cathedral4 bars total | 125 ms | 7875 ms | 8000 ms |
| Club Hall1 bar total | 31.25 ms | 1968.75 ms | 2000 ms |
| Short Hall1/2 note total | 15.63 ms | 984.38 ms | 1000 ms |
How hall reverb timing works
A concert hall is engineered space: a high ceiling, hard parallel surfaces and a long path between the stage and the back wall. Sound takes time to cross that volume, so a hall's reflections arrive later and build more gradually than a small room's, then decay slowly and evenly. That slow build and long release is the character this calculator captures — grandeur and distance, the sense that the music is happening somewhere significant. It is also why hall presets carry the longest totals on this site: a convincing hall tail needs beats, not fractions of a beat, to unfold.
As on the combined reverb and delay calculator, every preset is a total length in quarter notes plus a pre-delay that is a small fraction of a quarter note:
Concert Hall runs 8 quarters with a 0.125-quarter pre-delay — the versatile large-space setting. Cathedral doubles everything: 16 quarters with a 0.25-quarter pre-delay, the longest preset anywhere on the site. Club Hall halves the concert setting to 4 quarters and a 0.0625-quarter pre-delay for smaller venues, and Short Hall runs 2 quarters with a 0.03125-quarter pre-delay, giving a hint of occasion without the wash.
Hall presets at 120 BPM
The table below fixes the four presets at 120 BPM so you can compare their scale. Type any other tempo into the tool above and every figure rescales — a Cathedral at a slow tempo is a very long commitment, as the worked example shows.
| Preset | Length | Pre-delay (ms) | Decay (ms) | Total (ms) |
|---|---|---|---|---|
| Concert Hall | 8 quarters | 62.5 | 3937.5 | 4000 |
| Cathedral | 16 quarters | 125 | 7875 | 8000 |
| Club Hall | 4 quarters | 31.25 | 1968.75 | 2000 |
| Short Hall | 2 quarters | 15.63 | 984.38 | 1000 |
For a printable reference across many tempos at once — every note value, dotted and triplet — use the BPM to milliseconds chart, which lays the same tempo math out as a full table you can keep by the desk.
Practical hall guidance
Orchestral parts and ballads take the long presets
Strings, pads, piano and slow lead vocals are the natural home of Concert Hall and Cathedral. Sparse arrangements leave air between phrases, so a four- or eight-second tail fills genuine space instead of competing with the next note. On a ballad vocal, the Concert Hall pre-delay of roughly an eighth of a beat keeps the first syllable clear while the tail carries the emotion; the vocal reverb calculator maps the same idea to specific genres. Cathedral is a special effect as much as a space — save it for intros, breakdowns and choral material where vastness is the point.
The danger is wash, not length
A long hall tail fails by accumulation: every note leaves a residue that the next note lands on, until harmony blurs and the mix sounds like it was recorded from the corridor. The tempo sync here is your first defense, because a tail that ends on a bar line at least clears in rhythm. If the wash persists, step down a preset before reaching for EQ — Club Hall keeps the hall signature at half the commitment. Busy, fast or rhythmically dense material rarely tolerates more than Short Hall.
Pre-delay stands in for the first reflections
In a real hall, the gap before the dense tail is filled by early reflections off the nearest walls and ceiling, and those reflections tell the ear how big the space is. This calculator sets the clean gap — the pre-delay — while the reflection pattern itself is a property of your plugin's algorithm. Keep the pre-delay generous on long presets: it is what separates "performer in a hall" from "performer underwater," and it costs you nothing in total length because the decay simply absorbs it.
For a smoother, smaller-scale alternative with a similar sense of occasion, compare these figures with the chamber reverb calculator — chambers run at half the hall lengths and often suit produced records better.
Limitations
Timing is only one dimension of a hall. This calculator cannot recreate a specific venue's reflection pattern, frequency-dependent decay or stereo image, and no preset here models a named real hall. Plugin hall algorithms vary widely in how they label their size and decay controls, so verify whether yours expects the decay value or the total. Finally, the longest presets assume sparse material: at fast tempos or in dense mixes the honest answer may be a shorter preset than the one you first reached for, and your ears overrule the table.
Frequently asked questions
Which reverb type has the longest decay?
Hall, and specifically the Cathedral preset here: 16 quarters, which is 8000 ms at 120 BPM before pre-delay is even considered. No other type on the site runs totals that long, because only large architectural spaces sustain a tail of that scale convincingly.
What is the difference between concert hall and cathedral reverb?
Both suggest large stone-and-plaster spaces, but a cathedral is bigger, harder and longer. In preset terms, Cathedral doubles the Concert Hall total and pre-delay. Use Concert Hall for a believable performance venue and Cathedral when the vastness itself is part of the arrangement.
Why does hall reverb make my mix muddy?
A hall tail from one note is still sounding when the next several notes arrive, so harmonics stack up and blur. Tempo sync helps the tail end on a bar line, but the real fixes are stepping down a preset size, keeping the return level lower than you think, and reserving long halls for sparse parts.
How much pre-delay does hall reverb need?
More than most types, because the gap sells the size of the space. The Concert Hall preset uses 0.125 quarters — 62.5 ms at 120 BPM and 83.33 ms at 90 BPM. Skimping on that gap collapses the sense of distance and smears the source's attack into the tail.
Can I use hall reverb on drums?
Selectively. A Short Hall can give a ballad snare or a tom fill a sense of occasion, but long halls on a full kit usually blur the groove. Keep drum halls short, or send only one element — often the snare — rather than the whole kit bus.
- Wikipedia — Reverberation — Background on reverberation in large spaces and how decay time is defined.
- iZotope — Learn — Reverb mixing guides on hall character, pre-delay and avoiding wash.
- Sound on Sound — Mixing technique articles on using long hall reverbs in arrangements.