All tools › Make a sound
Tone generator
A steady tone of any shape and frequency, written as a file to play elsewhere.
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
- Frequency
- Above half the sample rate a tone folds down and comes out lower.
- Shape
- Only the sine is band-limited; the others buzz faintly by design. Choices: Sine, Square, Triangle, Sawtooth.
- Seconds
- A number from 1 to 600.
- Level
- Full scale through headphones is loud enough to hurt. A number from 1 to 100.
- Sample rate
- Choices: 8 000 Hz, 16 000 Hz, 22 050 Hz, 44 100 Hz, 48 000 Hz, 96 000 Hz.
- Channels
- Choices: Mono, Stereo.
- Soften the ends
- A tone that starts at full amplitude starts with a click.
- Bit depth
- Sixteen is the compact disc; float is what a mixing desk hands over. Choices: 8, 16, 24, 32 (float).
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 make a sound
Noise generator
White, pink and brown are three genuinely different things, and the slope of each is on the result.
Frequency sweep
A tone that slides from one frequency to another, logarithmically, because pitch is a ratio.
Binaural beats
Two near tones, one to each ear. What the file contains is certain; what it is claimed to do is not.
Click track
A metronome as a file: a fixed tempo with the first beat accented, and it will not follow you.
Morse code audio
Text sent as Morse at a stated speed, with Farnsworth timing and the code written out beside it.
Intervals and chords
An interval or a chord written out to play, together or one note at a time.
All twenty-three tools