Pre-Delay & Reverb Tail Calculator
BPM-synced pre-delay and reverb tail calculator with animated timeline, source/type/position controls, and famous presets.
About the Pre-Delay & Reverb Tail Calculator
The Pre-Delay & Reverb Tail Calculator is a free interactive tool for music producers who want accurate answers fast. Whether you're searching for pre-delay calculator BPM, reverb tail length calculator, reverb decay time BPM sync, this tool gives you real-time results without leaving your browser — and explains the reasoning behind every value so you know what to do with it.
Every tool on MusicProductionWiki is built around one principle: answer the question and explain the reasoning. The Pre-Delay & Reverb Tail Calculator not only calculates — it shows you why those values work, what changes when you adjust them, and what professional producers do differently across genres.
This tool is part of the Time & Modulation category. It's embedded directly inside the relevant entries in The Producer's Bible — MPW's comprehensive reference library — where it appears in context alongside the theory that explains why each setting works the way it does.
All tools on MusicProductionWiki are free, require no login, and work in any modern browser on desktop or mobile.
Frequently Asked Questions
What is the purpose of pre-delay on a reverb?
Pre-delay creates a gap between the dry signal and the start of the reverb tail. This preserves the attack and intelligibility of the source while still placing it in a space. Without pre-delay, reverb begins immediately and can smear transients — especially on vocals and snares.
How long should my reverb tail be?
The tail should clear before the next strong beat. At 120 BPM, a bar is 2,000ms — a tail longer than 1,500ms risks bleeding into the next phrase. Shorter tails (300–800ms) work well for tight, rhythmic reverb. Longer tails (1.5–4s) work for ambient pads and slow ballads.
What is the Phil Collins gated reverb technique?
The famous In the Air Tonight snare sound uses a long room or hall reverb with a noise gate set to cut the tail short. The gate closes quickly after the snare hit, leaving only the attack of the reverb. The result is a massive, punchy transient without a long wash. The tail length sets how quickly the gate closes.