doopidoop

Settings

Bars are separated by |. Chords in the same bar share it equally.
% repeats the previous bar. It stands alone in its bar.
A new line also starts a bar. Bar lines at the start or end of a line are optional.
A bass note goes after a slash: D7/F♯. The bass counts: B♭/C is heard as a C9sus4.
Repeats: |: and :| play the bars between them twice, :| x3 three times. Endings 1. and 2. go at the start of a bar.
Sections: a name in brackets, [A] or [Bridge], starts one. A name alone replays that section: type an AABA tune as [A] … [A] [B] … [A].
Key changes: key:E♭ in a section name ([B key:Eb]) or at the start of a bar sets the key from there to the end of the section.

Letters A to G, ♯ or ♭, then a type. Capitals matter: M7 is major, m7 is minor.

Symbol	Name	Also accepted

The numeral is the chord root's degree in the key, counted on the major scale: ♭III is a minor third above the tonic. Lower case marks a chord with a minor third.
V7/ii is the dominant of ii. subV7 is its tritone substitute, a half step above the chord it resolves to.
A key name above a chord means the harmony has moved to that key. Chords then take their numeral in the new key.

Tap a chord in the grid: its scales are listed best fit first, with the reason. The best fit depends on the key, the chord's role and what it resolves to.
Highlighted notes belong to the chord. A scale that lacks a chord tone says which.
Notes are always written with letters (C D E F G A B), in every language.