◀ VibeCruiser

toaster

A free audio visualizer — play it in your browser, no install. Hears whatever's playing and writes it out as live Strudel code, with visuals that move to it. Free in your browser, or as a Windows and Mac app.

by @StopBanning · StopBanning/toaster on GitHubLANG JavaScript★ 58HOSTED ON TOASTER.LOCUST.LOLUPDATED 26 Oct 2026

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Controls: These are the keys as they come; every one can be changed in the help (?)…

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Open the live demo Source on GitHub

From the README

Toaster hears whatever is playing on your PC (Spotify, YouTube, anything) and writes it out as live Strudel code in front of you: named lines typed into a blank window and lighting up as they play, over ASCII visuals, a dot orb, punchcard blocks or your webcam. Toaster, as in Toaster Strudel.

Download for Windows or Mac

It finds the beat, the kick, clap and hats, the bass line, the chords and the key, and keeps rewriting the code as the song moves. It's a live reconstruction for show, not an exact transcription. Press X and it hands you the whole song as Strudel code and as a MIDI file.

Read the full README on GitHub →

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