Stage mode: play without looking away from the chart

You set the running order in advance, then switch to stage mode: the chart fills the screen with no clutter, and you move from one song to the next with a single gesture. It is designed for a music stand or a tablet sitting on an amp.

This is the most carefully built part. When one member starts a song, every device in the band switches to the same chart, and the playback position is computed from a shared timestamp rather than streamed continuously. Devices align their clocks with the server through a series of round trips, keeping the fastest — the same principle as computer clock synchronisation. The result: everyone sees the same bar at the same moment, even on a patchy network.

Six instruments can play at once — guitar, bass, piano, mandolin, banjo and ukulele — each in block chords or arpeggios. Tempo runs from forty to three hundred beats per minute, with a metronome you can mute without stopping playback. You can start a whole song, a section, or a single bar to work on a passage.

Eighteen patterns across six families: rock and pop, jazz and blues, reggae and Latin, funk and soul, hip hop, country and folk. Fifteen drum voices, sampled from an eighties drum machine. Patterns are written over two bars, so the second one varies — a fill, ghost notes — instead of looping identically.

Lighter than a band: a six-character code, chosen without ambiguous letters or digits so it can be read aloud, valid for six hours. Guests join without creating an account, and any participant can push a chart to everyone else’s screen.