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
Music theory app
Music Theory App for Chords, Scales, and Ear Training
Learn intervals, scales, chords, and ear training with guided daily practice. Build real musicianship with short exercises designed for consistency.
Join thousands of musicians building music skills.
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.
Feature
Understand how music works, step by step
Sonid helps you learn music theory in a clear order, one concept at a time. Start with notes and intervals, then build into scales, chords, modes, and harmony.
Each lesson connects directly to real playing, so you do not just memorize theory, you use it. Learn faster, hear progress sooner, and build confidence on your instrument.
Play with more freedom and control
When you understand theory, you make better musical choices. Sonid teaches you how to move from basic building blocks to advanced sounds without getting lost.
Train chord quality, inversions, substitutions, and modal color in practical steps. From your first triads to lush jazz harmony, every lesson is built for real results.
Practice daily with the Sonid app
Use the app for guided exercises in intervals, ear training, chords, scales, and modes. Short sessions make it easy to stay consistent and keep improving.
Use the web libraries as your fast reference for notes, intervals, chords, and scales whenever you study, teach, write, or rehearse.
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 Unison
Today we start something new: Sonids Spotify Playlists! We start with the Perfect Unison interval.
July 23, 2025
Ear Training Playlist - Major Seventh
We are back with our weekly playlist! This week, we are shining the spotlight on the major seventh interval with a handpicked selection of incredible songs to help you train your ears.
July 23, 2025
Music theory basics: the major scale
Master the "DNA" of music theory with our guide to the major scale. Learn the universal W-W-H-W-W-W-H formula, understand key signatures, and unlock the seven modes to elevate your songwriting and instrumental mastery.
July 23, 2025
Built for your learning, not ours.
Bring your favorite instruments and learning style. We'll handle the theory (not the practice ?)
We're on a mission to teach music!
Comprehensive music education shouldn't require conservatory training or expensive lessons. Our mission is to make music theory accessible to everyone.
Music theory app for real musicians
Sonid is a music theory app built for practical progress: notes, intervals, scales, chords, modes, and ear training in one guided learning flow.