Bytebeat: Make Music with Code
Write a formula, hear music
Free · Designed for iPad. Not verified for macOS.
t*(42&t>>10) — that one line is the whole song. No synth, no samples. Change a single character while it plays and the music turns into something else.
t*(42&t>>10)
That one line is the whole song.
Bytebeat turns a formula straight into sound. It evaluates your expression while t counts up from zero, one step at a time, and writes the result out as the waveform. No synthesizer, no audio files, no samples. The formula is the music.
■ Edit while it plays
- Rewrite the formula without stopping playback. t keeps running
- Change a single character and the song becomes something else
- A keypad holding only the characters that appear in bytebeat formulas, so one tap is one character
■ See the waveform
- An oscilloscope draws the samples that are actually playing
- Traces are aligned to the rising edge, so the wave stays still instead of scrolling
- Instruction count and stack depth are shown too
■ 29 famous formulas
- Includes the one-liners from the experiments viznut published in 2011
- Save the ones you like to favorites with your own names
■ Three modes
- Bytebeat: result & 255 mapped to 0...255, the way the original sounded
- Signed: treated as signed 8-bit
- Floatbeat: the result used directly as a -1...1 waveform, where sin and cos come alive
■ Change the speed of t
- 500 to 48000 Hz. The original bytebeat ran at 8000 Hz
- Slower runs lower, faster runs higher
■ Export to WAV
- 8-bit, 8000 Hz, mono, which is exactly what bytebeat is
- 10 seconds, 30 seconds, 1 minute or 3 minutes
■ What you can write
- The variable t, and the constants PI and E
- Arithmetic, bitwise operators, shifts, comparison, logic, the ternary operator
- sin cos tan asin acos atan abs floor ceil round sqrt exp log sign int pow min max atan2 mod
- Everything is computed in Double and rounded to 32-bit integers only for bitwise operations and shifts. This matches JavaScript's ToInt32, so formulas you find on the web play as they are
■ No connection
- No account to create
- No ads, no tracking
- The app never connects to the internet. It works on a plane
Many of the presets come from the experiments Ville-Matias Heikkila (viznut) published in 2011.
The developer, Ryo Tsudukihashi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- TsuzuKit
- Size
- 2.7 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 TsuzuKit