What's the difference between major and minor?
Major sounds brighter and minor gives a darker sound. Read on to learn more about major and minor.
July 23, 2025
Learn, practice, and master music theory.
Build your musical foundation, understand complex harmonies, and develop your skills from basic intervals to advanced chord progressions.
Helping thousands of learners, teachers, and music lovers across the world.
Build your theoretical knowledge
Every musician needs fundamentals, practice, and guidance. Sonid gives you a complete learning system that's fun and easy to use.
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Understand how music works!
Sonid offers you all you need to learn music theory. You practice music theory online, in a fun and orderly manner. It is different in comparison to other courses because you will learn about a single subject at a time.
This approach will make your understanding of music expand more naturally and gives you the time to adapt to the new material. Sonid is made for beginners and more advanced musicians that would like to broaden their musical horizon. Complete Sonid and become a more refined musician!
Free yourself musically!
With Sonid you can learn everything about music theory, from the most basic subjects to advanced jazz harmony understanding. Start taking classes to learn about naturals, the prime interval and a flat note.
Finish your music theory course with playing the most lush maj7#11 chord voicing and the melancholic spanish phrygian scale on your instrument. You can learn it all, step by step.
Practice music theory online
Sonid teaches you all you need to know about music theory. Follow classes in our web-app and start your musical journey. In our dictionary you can find all the scales, chords and intervals, with a brief explanation.
Let your ears help you play music
Let your ears help you play the right notes and chords by understanding which progressions are in a certain key. Use ear training to know which scale is to be played at a given moment in your song. Make variations of what is to be expected by altering modes.
Play beautiful melodies in any key
Find the right notes at the right time. Build your solo from the ground up and be able to express yourself with passion and rejoice. Use the most basic C major and A minor keys, church modes like G dorian or F lydian and altered scales like D mixolydian #11 to make your phrasing spot on.
Use chord substitutes and inversions
Make your playing sound unique by using different versions of chords, or replace them altogether to give a change of color in your voicing. Substitute Fmaj7 with Dm9 or play an inspiring Amaj9#11 instead of B7 to sound genuine and in control of your instrument.
Write the most compelling songs
Composing new melodies and chord progressions will never feel the same after completing the music theory lessons. Express your emotions just the way you want. Explore new realms of music harmonies and take your listeners on a fantastic journey.
Communicate with musicians
Let your fellow musicians know what you expect from them, using the correct terminology. This way, you will create an open and creative environment to let your songs grow more naturally.
Read our blog to level up your learning!
Your weekly dose of music theory wisdom, practice tips, and behind-the-scenes updates to keep your music adventure exciting ?
Q&A: Music theory helps you listen more closely
We reached out to Flumpy Duck and asked him some questions. With 26784 points he has the most XP of all users!
July 23, 2025
What's the difference between a sharp and a flat?
Sharps and flats are complicated. Read more to know the difference between them.
July 23, 2025
Ear training Spotify playlist - Perfect Prime
Today we start something new: Sonids Spotify Playlists! We start with the Perfect Prime interval.
July 23, 2025
Ear training Spotify Playlist - Major Seventh
We've made a new Spotify Playlist this week! This time we take a look at the major seventh and teach you how to identify it by ear.
July 23, 2025
Music theory basics: the major scale
In this article you will learn more about the major scale.
July 23, 2025
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Bring your favorite instruments and learning style. We'll handle the theory (not the practice ?)
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Comprehensive music education shouldn't require conservatory training or expensive lessons. Our mission is to make music theory accessible to everyone.