Learn music theory with Sonid

    • For teachers & schools

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    Learn music theory with Sonid

    Learn music theory with practical tools, guided app exercises, and a complete reference for chords, scales, notes, intervals, and modes.

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    • For beginners
    • For guitarists
    • For pianists
    • Ear training
    • Theory practice

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    • For teachers & schools

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    Theory

    • Intervals
    • Interval playlists
    • Chords
    • Scales
    • Terms
    • Notes reference

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    • Music Theory Playground
    • Metronome
    • Why and how to play with a metronome
    • Tuner

    Community

    • Blog
    • Basics
    • Ear training
    • About us

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    About

    Created byMartijn van der Eijk
    Written byLida van der Eijk
    Vectors byFreepik

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    YoutubeMusic Theory Video SeriesA step-by-step guide to music theory fundamentals. These 60-second videos provide a clear, structured path to understanding how music works, optimized for a full-screen learning experience.YoutubeMusic Theory ShortsMaster music theory concepts in 60 seconds or less. Quick, vertical videos designed to give you essential theory knowledge in a fast-paced, mobile-friendly format.
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    @copyright Martijn van der Eijk 2026
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    5. Learn music theory video 2: Sharp

    Learn music theory video 2: Sharp

    Author: Lida van der Eijk
    July 23, 2025

    Learn music theory with Sonid is an app for iOS and Android that teaches you the fundamentals of music in an approachable and fun way.

    Music theory libraries
    Chord libraryScale libraryInterval guide
    Music theory libraries
    Chord libraryScale libraryInterval guide

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