Delay & Reverb Time Calculator
Use BPM-synced values to quickly set musical delay times, pre-delay, and reverb decay.
Why a Reverb and Delay Calculator Matters
Time-based effects can make a mix feel polished, wide, and emotional—or blurry and unfocused. The difference usually comes down to timing. A delay or reverb that lines up with the song tempo sounds intentional. One that does not can mask transients, cloud vocals, and make grooves feel late.
This reverb and delay calculator helps you convert BPM into exact milliseconds, so you can quickly set plugin values without guessing.
How the Calculator Works
1) Delay Time
The main delay value is based on note length and BPM. For example, at 120 BPM, a quarter note is 500 ms, an eighth note is 250 ms, and a dotted eighth is 375 ms.
2) Stereo Offset
Stereo offset lets you push left/right timings apart slightly for a wider image. Small offsets (5% to 15%) can add movement while still sounding tight.
3) Reverb Pre-delay
Pre-delay creates separation between the dry sound and reverb tail. Short values glue sounds together; longer values preserve clarity and keep vocals up front.
4) Reverb Tail
Tail length in beats gives you a musical decay target. Instead of dialing random seconds, you can tie decay to a phrase length so the reverb breathes with the arrangement.
Quick Starting Points
- Lead vocal pop: 1/8 dotted delay, 1/16 pre-delay, 2–4 beat tail.
- Ambient guitar: 1/4 or dotted 1/4 delay, 1/8 pre-delay, 6–12 beat tail.
- Snare space: 1/16 or 1/8 slap delay, short pre-delay, 1–2 beat plate tail.
- EDM synth: 1/8 triplet or 1/16 delays, medium pre-delay, tempo-locked tails.
Mix Workflow: Fast and Musical
Step 1: Set BPM first
Always lock tempo before dialing effects. If your song tempo changes, revisit time-based settings.
Step 2: Pick rhythmic intent
Use quarter and eighth notes for obvious rhythmic echoes; dotted and triplet values for motion and groove complexity.
Step 3: Control density with feedback
Short notes usually need less feedback. Longer notes can handle more repeats before the mix gets crowded.
Step 4: Use EQ on effects returns
High-pass and low-pass your reverb/delay returns. This preserves vocal intelligibility and low-end punch.
Common Mistakes to Avoid
- Using too much long-tail reverb on every track.
- Ignoring pre-delay, which causes dry/wet smearing.
- Adding stereo offset so large that it sounds out of time.
- Not checking mono compatibility after widening effects.
Final Tip
A calculator gives you clean starting values. Then trust your ears. Nudge settings by a few milliseconds if needed to fit the performance, arrangement, and emotional tone of the song.