Sources & illustrations

These primary references support the background explanations. Read the source for details, updates and exceptions.

Background reading

• Open Music Theory: major scales
• Open Music Theory: rhythm and meter
• Open Music Theory: triads
• musictheory.net: lessons
• musictheory.net: introduction to chords

Original illustrations and examples

The subject illustration and guide diagrams are original vector drawings. Worked examples and practice exercises are original teaching material. They do not represent an experiment or a personal product test. We do not reproduce reference-site articles, photographs, dictionary definitions, music scores or puzzle answers.

Scope

Foundational rhythm, pitch and original instrument practice. No copyrighted song sheets, lyrics, microphone tuning, concert listings or music-festival planning.

References checked on 18 October 2026. Product interfaces, regional advice and datasets can change after publication.