[{"data":1,"prerenderedAt":27},["ShallowReactive",2],{"content-bpm-calculator-en":3},{"about":4,"steps":7,"faq":11},[5,6],"Delay and reverb times sound best when they match the tempo of the song. The BPM calculator converts the tempo into milliseconds for every note value from whole notes to 64th notes – straight, dotted and triplet – and shows the matching LFO rate in hertz. You can also tap in the tempo.","It also calculates how long a number of bars lasts in any time signature (and the other way round), and how much speed and pitch change when you take a track from one tempo to another – handy for DJs. To practise at the right tempo, use the [[metronome]]. Everything is calculated locally in your browser.",[8,9,10],"Enter the tempo in BPM or tap it in with the tap button.","In “Delay times”, read the milliseconds for the note value you need and copy them into your delay or reverb plugin.","Choose “Bars ↔ time” to work out the length of a section, or “Tempo change” to see percent and semitones between two tempos.",[12,15,18,21,24],{"q":13,"a":14},"How do I convert BPM to milliseconds?","A quarter note lasts 60,000 ÷ BPM milliseconds. At 120 BPM that is 500 ms, an eighth note lasts 250 ms and a sixteenth 125 ms. Dotted notes are 1.5 times as long, triplets two thirds as long.",{"q":16,"a":17},"Does BPM refer to quarter notes?","Yes. Like DAWs such as Ableton Live, Logic or Cubase, the calculator counts quarter notes per minute. A bar of 6\u002F8 is therefore three quarter notes long; at 120 BPM it lasts 1.5 seconds.",{"q":19,"a":20},"What does the value in Hz mean?","Hz is how many times per second a note value repeats – the rate you set on an LFO for tremolo, filter or auto-pan effects so that it moves in time. At 120 BPM an LFO in quarter notes runs at 2 Hz.",{"q":22,"a":23},"How many semitones does the pitch change with a tempo change?","If a track plays faster without time-stretching (like on a turntable), the pitch rises by 12 × log₂(new ÷ old tempo) semitones. From 124 to 128 BPM that is +3.2 % speed and about +0.55 semitones. Double the tempo is exactly one octave.",{"q":25,"a":26},"How does tap tempo work?","Tap the tap button at least twice in time, or press the T key. The calculator averages the intervals of the last eight taps. If you pause for more than two seconds, a new measurement starts.",1792323198021]