コンプレッサーのアタック・リリースをBPMと音価に同期させ、きれいなサイドチェインポンピングを実現。ハウス、ドラムンベース、ダブステップ向けのプリセット付き。
| Note | Straight (ms) | Dotted (ms) | Triplet (ms) |
|---|
1 beat (quarter note) = 60 000 / BPM ms. Each note value is a multiple of that beat — 1/16 = ¼ × beat, 1/8 = ½ × beat, etc. For sidechain pumping a common starting point is a fast attack (1/16 to 1/32) and a release that opens up just before the next kick (1/4 to 1/8).
For four-on-the-floor pumping at 128 BPM the kick lands every 468.75 ms — set release a touch shorter than that.
The tool converts tempo into compressor time constants. One beat — a quarter note — lasts 60000 ÷ BPM milliseconds, so at the default 128 BPM a beat is 468.75 ms. Every note value is a fraction of that: 1/16 is 0.25 × beat, 1/8 is 0.5 ×, 1/1 is 4 ×. The reference table below the readout multiplies each straight value by 1.5 for dotted notes and by 2/3 for triplets, giving all three grids at once.
BPM does the most work, since every figure scales inversely with it. After that come the two note-value selects: attack defaults to 1/16 and offers 1/64 through 1/4, while release defaults to 1/4 and offers 1/16 through 1/1. The genre buttons set both at once. House (124) uses 1/16 and 1/4; Techno (130), D&B (174) and Trap (140) all use 1/32 and 1/8; Dubstep (140) drops the attack to 1/64.
Note values are musical durations, not what your compressor actually does. Plugins define release as the time to recover a set fraction of gain reduction, and curve shape, knee, ratio and lookahead all change the audible envelope — none of which the calculator models. Treat the millisecond figures as a starting point you then dial in by ear. Note too that the built-in tip says release should sit a touch under one beat, yet the default 1/4 release equals a full beat at any tempo.
With the defaults — 1/16 attack and 1/4 release — 128 BPM gives 117.19 ms attack and 468.75 ms release. The kick lands every 468.75 ms, so shorten the release slightly: pick 1/8, which is 234.38 ms, if the pump feels late.
One quarter-note beat is 60000 ÷ BPM milliseconds. Multiply or divide by powers of two for other note values: 1/8 is half a beat, 1/16 a quarter of one, 1/2 twice one. The BPM field accepts anything from 20 to 400 in 0.1 steps.
The dotted column multiplies the straight value by 1.5 and the triplet column by 2/3. Dotted timings suit swung or garage-flavoured pumping, triplets suit shuffled and half-time patterns. Both are listed for every note from 1/1 down to 1/64.
The D&B (174) button sets 174 BPM with a 1/32 attack and 1/8 release, which works out at 43.10 ms and 172.41 ms. Techno (130) and Trap (140) use that same note pair at their own tempos, so their millisecond values differ.
Yes for the timing grid, because the values are just note lengths at your tempo, so the release figure works as an envelope length in a gain-shaping plugin. The calculator has no threshold, ratio or depth control, so shape the curve itself by ear.
BPM to Milliseconds Delay Calculator
Convert BPM to milliseconds, Hz and seconds for every note value — 1/1 down to 1/64 triplets and dotted notes.
Sample Rate & Bit Depth File Size Calculator
Estimate audio file size from sample rate, bit depth, channels and duration for WAV, AIFF and FLAC.
Musical Note Frequency Calculator (Hz)
Convert any note to frequency in Hz across all octaves, with custom A4 tuning and cents detuning.
Loop Length Calculator (Bars to Seconds)
Convert bars or beats to seconds or samples at any BPM and time signature for perfect loops.
