Music theory is not a wall of jargon—it is a map from what you hear to what you play. This beginner guide walks you through notes, intervals, scales, and chords in order, with free Sonid libraries, practice exercises, and a clear path into the app.
Music theory app
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 ?
Capo puts Sonid’s chord and scale library on an interactive fretboard for guitar, bass, ukulele, mandolin, and more. The mobile app launches July 4, 2026 — here’s everything waiting on the neck.
Master interval recognition with real music. This hub links every Sonid ear-training playlist post—handpicked songs for P1, m2, M2, m3, M3, P4, P5, m6, M6, m7, M7, and P8—plus a practical study path for relative pitch.
A single musical note holds no emotional value on its own. Its surrounding environment entirely dictates its color. If your goal is writing better melodies, you must look past random note selection. Learn how to combine horizontal movement with vertical harmony to stop guessing and start directing your listener’s exact emotional response.
Sonid 3.6.4 is live on iOS and Android with smoother Learn & Analyse, guided tours, a visible streak, and a bigger florin store (boosts, streak shields, combo starters, lesson tokens, and more). On sonid.app: practice deep links, listen & solfege examples, the Music Theory Playground—and Sonid Classroom for teachers is coming soon.
Built for your learning, not ours.
Bring your favorite instruments and learning style. We'll handle the theory (not the practice ?)
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.