All tools › Pitch and tempo
Cents and intervals
The distance between two pitches, and how far equal temperament is from the pure ratios.
It runs entirely in this browser tab: the file you open is never uploaded, nothing here listens to a microphone, and every result is a file rather than something that plays.
Settings
- What
- Choices: Two frequencies, An interval.
- From
- In hertz.
- To
- In hertz.
- From this note
- The note the interval is measured from.
- Semitones
- A number from -24 to 24.
- Compare with pure ratios
- Equal temperament's major third is fourteen cents sharp of the one two strings lock onto.
How to use it
- Paste your text into the box above, or open a file.
- Adjust the settings beside it until the result is what you wanted.
- Copy the result, or save it as a file. The result updates as you type.
Questions
- Is my recording uploaded anywhere?
- No. The whole application is carried as WebAssembly and runs on your own device. There is no server to send anything to, and none of these tools makes a network request while it works.
- Why does nothing play?
- Because a player would be a second application. Every result is a file to open in whatever you already listen with, and saying so is more honest than drawing a play button that does nothing.
- Does the tuner or the metronome use my microphone?
- No, and the browser will never ask for one: there is no code here that could use it. The tuner reads a file you open, the tempo tool reads times you type, and the metronome writes a click track.
- Which formats can it open?
- WAV is read and written whole. MP3, FLAC, Ogg, AAC and AIFF are recognised and described from their headers — the format, the rate, the channels, the length — but their audio is not decoded, and a tool that needs samples says so by name.
Other tools for pitch and tempo
Note frequency table
Every note and its frequency, at 440 or 415 or whatever you tune to, with the difference in cents.
Delay and reverb times
A tempo turned into milliseconds for every note length, dotted and triplet included.
Tempo from tap times
Paste the times from anywhere — a stopwatch, a marker list, a video's timecodes — and it does a tapper's arithmetic.
Sound level and exposure
How long a level is safe for, and why two equally loud sources are three decibels louder rather than twice.
All twenty-three tools