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Basics

How to know which key you're in

Understanding the key of a song is one of the most useful skills in music theory. Whether you're working from chords, a melody, or a recording, there are reliable ways to figure out the tonal center and identify the key without guessing.

July 1, 2026
Product

Product Update: June 2026

June brought Capo — our new fretboard app for guitar, bass, ukulele, and mandolin — plus getcapo.sonid.app and deep links from sonid.app. Sonid moved to 4.0.16 with a refreshed exercise library and a smoother start for new users. On the web: free metronome and tuner tools alongside the Playground — and we started building native Sonid for iOS.

What If Bach Had Never Existed?

If Johann Sebastian Bach had never lived, our music would look very different today. Bach wasn't a dusty composer who only wrote church music—he was also the architect of Western music.

Basics

How to Read Chord Symbols

Learn a simple way to read chord symbols. Start with the root, read the quality, add the seventh, then check added notes, extensions, and alterations.

Latest posts


Coming Soon: Capo by Sonid
Product

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.

Ear Training Playlist - Tritone
Ear training

Give your relative pitch training a powerful upgrade! Learn how to effortlessly identify the sharp, unstable sound of the tritone with our expert ear training guide and handpicked playlist.

The ultimate guide to understanding music
Basics

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.

Why and how to play with a metronome
Basics

You can know all the theory—timing is where it becomes real. The metronome isn’t a drill sergeant; use it to build a pulse you trust, practice with purpose instead of chasing BPM, and hear your playing lock into time.

Product Update: May 2026
Product

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.

minor seventh interval eartraining
Ear training

Give your relative pitch training a powerful upgrade! Learn how to effortlessly identify the rich, unresolved sound of the minor seventh interval with our expert guide and custom tracklist.

The Music Theory GPS: Understanding the Circle of Fifths
Basics

Unlock the ultimate roadmap of music theory. Learn how the Circle of Fifths organizes every key, why certain scales are "neighbors," and discover the professional secret of using "gatekeeper" chords to change keys smoothly in your songwriting.

Store-focused visual for Sonid 3.4.0 release post
Product
Sonid 3.4.0 is back on Android and iOS with a full UI revamp, latest Vue upgrade, new Italian/Portuguese/German locales, language-aware solfege notation, and new sonid://exercise deep links from the website.
Ear training

We are back with our weekly playlist! This week, we are shining the spotlight on the minor second interval with a handpicked selection of ten incredible songs to help you train your ears.

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