1. MusicTheory.net: This comprehensive website provides a structured and interactive approach to music theory, including lessons, quizzes, and music tutorials.
2. Teoria.com: Another excellent resource for beginners, offering an extensive range of free interactive music theory lessons.
3. Coursera: Access university-level music theory courses from renowned institutions such as the University of California, Berkeley, and Berklee College of Music.
4. OpenStax: Find a free, downloadable introductory music theory textbook available in PDF, ePub, and online formats.
5. YouTube Channels: Channels like "MusicTheoryForGuitar" and "Signals Music Studio" offer visual explanations and tutorials on music theory concepts.
Books:
1. Music Theory for Dummies (Book Series): A popular series of beginner-friendly books covering fundamental music theory concepts, exercises, and examples.
2. The AB Guide to Music Theory Part 1 by Eric Taylor: A clear and concise introduction to music theory, suitable for both musicians and non-musicians.
3. Music Theory for Beginners by Keith Wyatt: A step-by-step guide that uses diagrams, illustrations, and real-world examples for easy understanding.
4. Basic Music Theory by Jonathan Harnum: An accessible and practical book suitable for complete beginners, covering essential music theory elements and notation.
5. Alfred's Basic Adult Piano Course (Series): A comprehensive method book series for adult learners, covering essential music theory concepts alongside piano lessons.
Apps and Software:
1. MusicTheory.net App: A companion to the website, this app offers interactive exercises, flashcards, and quizzes for studying music theory on the go.
2. Tenuto Music Theory: An educational software program with structured lessons, practice exercises, and visual aids for learning music theory.
3. Simply Music Theory (iOS): An app that utilizes interactive exercises and quizzes to help beginners grasp music theory.
4. Music Tutor (Android): An app that incorporates lessons, quizzes, and reference guides to help users build their understanding of music theory.
5. Dolmetsch Online: An online music theory course platform with video tutorials and interactive exercises, tailored to different levels of learning.