Learn music theory

The foundations every musician leans on, one clear page at a time. Each guide ends with a link to practise it in Accidentals, a few minutes a day.

• The circle of fifthsAll 15 major keys and their relative minors in one picture, and how to read it.
• The order of sharps and flatsThe two sequences every key signature is built from, with memory tricks.
• Key signaturesEvery major key signature on the staff, and how to read one in seconds.
• Major scalesThe whole and half step pattern, and every major scale spelled out.
• IntervalsHow intervals are named and counted, with the 3rd and 5th of every key.
• Chords in every keyThe seven chords of every major key, with Roman numerals.