Xenpaper

Xenpaper is a text-based microtonal sequencer. It supports notes and chords in relative pitch, including just intonation, equal-step tunings, arbitrary tuning in cents and indexed notation within an equal-step tuning or a custom scale, as well as in absolute pitch (in Hz). Other features include customizing the BPM and oscillator, looping, displaying a pitch ruler, and sharing tunes by URL or iframe.

The first version of Xenpaper, developed by Damien Clarke (aka mosfez), was released on March 8th, 2021 (or possibly earlier^{[to be confirmed]}). Version 1 only supports one voice at a time, including chords.

A beta version of Xenpaper 2, developed by Lumi Pakkanen (aka frostburn), was released on May 29th, 2026. Version 2 adds support for multiple voices, which can be edited in separate tabs within the app.

Xenpaper is designed to help musicians easily create short tunes and experiment in their web browser, hence its slogan: "Write down musical ideas and share the link around."

External links

Xenpaper 2 (beta)

• Official website

Xenpaper

• Official website
• Mirror @ luphoria.com
  • The old site (https://xenpaper.com/) is down. To transfer a link for a xen sketch from the old site, replace https://xenpaper.com/# with https://dxinteractive.github.io/xenpaper/# or https://luphoria.com/xenpaper/#
• GitHub repository