# DelayCalc BPM: Delay & Reverb — LFO, loop length, key & pitch > LFO, loop length, key & pitch (iPhone/iPad app by KENTA OSAWA.) - Source: https://appshunter.io/ios/app/delaycalc-bpm-delay-and-reverb/id6776454466 (this page in markdown: same URL + `.md`) - Developer: [KENTA OSAWA](https://appshunter.io/developer/1896774876) - Category: Music, Utilities - Price: $2.99 - Age rating: 4+ - Requires: iOS 15.0 · 18 MB - Languages: American English - Released: 2026-06-09 - Data updated: 2026-08-15 - User reviews in markdown: https://appshunter.io/ios/app/delaycalc-bpm-delay-and-reverb/id6776454466/reviews.md ## What is DelayCalc BPM? Type one tempo and every time-based value for that song comes out at once. Delay times, LFO rates, reverb tails, loop lengths in odd meters, the key after a tempo change, and sample counts. No reopening a second calculator. Dark enough to read in a studio, and every value copies with a tap. ■ Delay & LFO Enter a BPM and every note value lines up with its delay time in ms and its LFO rate in Hz. Straight, dotted and triplet, plus 5- and 7-tuplets (5:4 / 7:4). Tap a note value for seconds and sample counts at 44.1 / 48 / 96 kHz. It goes the other way too. Enter the ms or Hz you already have and get the BPM back, with the closest note values listed — so "what tempo is this pedal's 375 ms" takes one entry. ■ Reverb Pre-Delay and Total Reverb Time from the tempo, with Decay and where the tail lands. Then Tail Clearance: whether the tail ends before the next hit, and by how much. Clear, overlapping, or exactly on it — as a number rather than a guess. The basis is stated on screen: Total Reverb Time includes Pre-Delay, quarter-note basis. Plugins define Reverb Time differently, and that is on screen too. ■ Tempo & Key From a sample's original and target tempo: Tempo Change, Playback Speed, Semitones and Cents. Then the key it lands on, in Camelot Key and Open Key, with the Harmonic Matches worth mixing into. Preserve Key (Master Tempo / Key Lock) treats the key as unchanged. Enter the original duration and you also get the new length, its sample count, and how it fits into bars. ■ Loop Length Bar and loop lengths from a time signature (3/4, 5/4, 5/8, 6/8, 7/8, 9/8 and more) in ms, seconds, Hz and sample count. Or the other way: give it a length and get the tempo. ■ Library Keep the setups you use, named, up to 50. Restoring brings back the page and the time signature, so you carry on where you were. ■ Where it earns its place · Setting delay and LFO values in a DAW · Keeping a reverb tail off the next hit · Matching a delay pedal or hardware synth to the tempo by hand · Getting the BPM and note value back from ms or Hz you already have · Loop lengths in odd meters, and sequencer rates · The key a sample lands on after a tempo change · Lining effects up to tempo at a rehearsal or a live set ■ What it does and does not do · Values use the project tempo, quarter-note based, so they match your DAW · Reverb and delay tails are starting points. Set the final value by ear, to suit the source and the gear · No microphone analysis, no DAW integration. You type, it answers ■ Quietly dependable · Saved setups stay on the device. Nothing is sent to a cloud · The core calculation works offline. Only the privacy policy opens a connection · No account · No ads · No subscription. One purchase · iPhone, iPad and Mac on that one purchase ■ Note values 1/1, 1/2, 1/2D, 1/4, 1/4T, 1/4D, 1/8, 1/8T, 1/8D, 1/16, 1/16T, 1/16D, 1/32, 1/32T, 1/32D Advanced: 1/4 (5:4), 1/8 (5:4), 1/16 (5:4), 1/4 (7:4), 1/8 (7:4), 1/16 (7:4) ## Version history (last 4 releases) ### 2.0.0 — 2026-08-04 Version 2.0.0 — a lot more of the song's timing, from the same one tempo ■ Reverb (new) Pre-Delay and Total Reverb Time from the tempo, plus Tail Clearance: whether the tail ends before the next hit, as a number. A starting point for keeping the next hit clean. ■ Tempo & Key (new) Playback speed, semitones and cents when a sample changes tempo — and the key it lands on, in Camelot Key with its Harmonic Matches. New duration, sample count and bar fit as well. ■ Loop Length (extended) Bar and loop lengths in odd meters, and now the tempo derived from a known length. ■ Library (extended) Name what you keep, up to 50 setups. Restoring brings back the page and the time signature too. ■ Japanese localisation Units, note values and industry terms stay as the studio writes them; the prose is translated. ■ iPhone, iPad and Mac One purchase covers all three. ■ Also Four areas instead of one long screen, resume on the tempo and page you left, haptics on each Tap Tempo strike, and a lot of smaller display and interaction fixes. Offline, no account, no ads and one purchase — unchanged. ### 1.1.1 — 2026-06-27 Version 1.1.1 — usability improvements - Cleaner, more compact layout — more delay / Hz values visible at a glance - Tap Tempo is now collapsible (expand only when you need it); your BPM stays put - The Reverse number field now has a Done button to dismiss the keyboard quickly - Small display and interaction refinements Still offline, still no account, still a one-time purchase. Added in 1.1.0: Reverse lookup, Meter & Loop Length, odd tuplets (5:4 / 7:4), one-tap copy, Saved Setups, and the Delay / Reverse / Loop mode switch. ### 1.1.0 — 2026-06-16 Version 1.1.0 — a big update with new modes and pro tools: - Reverse lookup: turn a delay (ms) or an LFO rate (Hz) back into BPM and the closest note values - Meter & Loop Length: bar and 1 / 2 / 4 / 8-bar loop lengths for odd meters (7/8 and more) in ms, seconds, Hz, and samples - Odd tuplets: quintuplets and septuplets (5:4 / 7:4), in the new Advanced divisions section - One-tap copy: send any value straight to your gear or DAW - Saved Setups: save the current calculation and restore it later (up to 20, stored on your device) - Faster BPM input: +/- nudge, long-press to repeat, and common-BPM presets - Common note values highlighted for quicker scanning - New Delay / Reverse / Loop mode switch ### 1.0.0 — 2026-06-09 No release notes. ## More apps by KENTA OSAWA - [Krites: Focus Mode](https://appshunter.io/ios/app/krites-focus-mode/id6771214773) - [Zone Slider Time](https://appshunter.io/ios/app/zone-slider-time/id6776867040) - [SixtySum - Time Calculator](https://appshunter.io/ios/app/sixtysum-time-calculator/id6776988090) - [PaperDPI - Print Gauge](https://appshunter.io/ios/app/paperdpi-print-gauge/id6777129279) - [Rehavo](https://appshunter.io/ios/app/rehavo/id6777686566) All apps by KENTA OSAWA: https://appshunter.io/developer/1896774876 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*