Toaster: Live Music Visualizer

Toaster listens to music and writes it out as live code in front of you. Named lines are typed into a blank screen and light up as they play, over moving visuals. 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 goes on. It's a live reconstruction for show, not an exact transcription. The code is Strudel, the open-source live-coding environment for music, so what you see is something you can run: export the whole song, or open the code in Strudel in your browser. What it listens to • The room, through the iPhone's microphone, including music another app plays through the iPhone's speaker • An audio file, from Files or shared to Toaster from another app • Your own internet radio: add a station by typing its stream address, with a name if you like, and it's kept on your iPhone. When a stream sends the song's title, Toaster shows it and looks for the cover • A demo beat, to try it right away What you see • 13 backgrounds, including a spectrum, a tunnel, a spiral, a pitch wheel, a spectrogram, rain and a scope • Chrome: a pool of liquid chrome that the kick drops beads into • Worlds: close-ups of everyday materials filmed as planets, cutting to the next one on the kick, in looks such as film, ink, risograph, cyanotype, thermal, night vision, CRT and VHS • Scenery: eleven animated scenes, from a lake and a campfire to a city in the rain and a koi pond whose koi you feed with a tap • A mosaic that cuts a radio song's cover, or one of a dozen bundled artworks, into squares and scrambles them in time with the music • A dot orb, punchcard or domino blocks, a liquid glass lens over the code, and five color themes • An ID card with the tempo, the key and, when it's known, the song's name The camera • Put yourself behind the code with the front camera: tinted to the theme, with your eyes and mouth blown up, or drawn as text • Seven camera effects: cut-out, slit-scan, datamosh, windows, glass, dots and voxels • Hand features, tracked on the iPhone: make a frame with your fingers to see through one of 16 filters, make a circle with your hands to open a portal (an X-ray of your skull first), and hold up hand signs to change the theme, hush the code or start recording Drops Turn on a drop effect (they start off) and, when the kick comes back after a break, it takes over the screen: a retro desktop flooded with pop-up windows, a crash screen, or a frozen window smeared across the visuals. Make something with it • Record the screen with its sound, saved to Photos • Drop clips: the build-up and the drop of each song, saved as videos of their own • Export the song so far as a MIDI file for your music software and as the whole song in Strudel code • Hold the iPhone upright for a vertical 9:16 layout made for short videos, or on its side for the wide one • TV mode: no bars, bigger code, a new background every 32 bars, and the screen kept awake. Mirror it to a TV with AirPlay. It keeps playing with the screen locked, with controls on the Lock Screen. Tap ? to see everything it does; tapping a row does it. With a keyboard attached, every action has a key. Everything Toaster hears and sees stays on your iPhone. No account, no ads, no tracking. Toaster is a native port of Toaster, the open-source app by Colin (github.com/StopBanning/toaster), used under its MIT licence. It is an independent app, not made by or affiliated with the Strudel project.