Interactive Music Theory Lab
Interactive Music Theory Lab is a free web app for learning music theory and shaping musical ideas.
What Interactive Music Theory Lab is
Interactive Music Theory Lab is a free web app for learning music theory and shaping musical ideas. Its Composition Studio lets users arrange progressions and song sections by dragging them into place, use theory-based suggestions, and export MIDI or PDF. Chord Lab offers a chord builder and library alongside piano and staff notation, voicings, and inversions. Scale Explorer covers more than 100 scales and shows their patterns on piano and fretboard. Theory Academy provides lessons, tutorials, and exercises on topics from intervals to voice leading. Users can upload MP3, WAV, OGG, M4A, or FLAC audio to detect chord progressions; detection may be less accurate with complex mixes. The interface also lists MIDI and MusicXML import and export, plus PDF and audio export. It requires no account and is free to use. The maker describes it as guidance for aspiring musicians and songwriters, rather than a tool that writes songs for them.
Good
- Free to use without an account.
- Scale Explorer includes more than 100 scales.
- Composition Studio exports MIDI and PDF.
- Theory Academy includes interactive lessons and exercises.
Watch out
- Chord detection may be less accurate with complex mixes.
- The maker says the app has bugs.
- It provides suggestions, not completed songwriting.
Who it suits
It suits aspiring musicians and songwriters who want to study theory while exploring chords, scales, and song structure. It can also help users who want guidance without having a tool write the song for them.
Verdict
Interactive Music Theory Lab brings theory lessons and composition tools together in a free browser app. Its chord and scale tools, exercises, and export options make it useful for learning while developing musical ideas.
Plans and prices
From Interactive Music Theory Lab's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free to use · No account required |
The facts
Each one read from Interactive Music Theory Lab's own pages, with the date it was checked.
What it does
- Account requirement
- The site says it is free to use and requires no account.checked 7 Oct 2026
- Audience
- The maker describes it as intended for aspiring musicians and songwriters, including people who want to understand how music works.checked 7 Oct 2026
- Audio analysis
- Users can upload audio files to detect chord progressions; supported formats include MP3, WAV, OGG, M4A, and FLAC.checked 7 Oct 2026
- Audio limits
- The site says chord detection works best on clear recordings and may be less accurate with complex mixes.checked 7 Oct 2026
- Chord tools
- Chord Lab provides an interactive chord builder, chord library, piano keyboard and staff notation, voicings, and inversions.checked 7 Oct 2026
- Composition
- The Composition Studio supports drag-and-drop progressions, song sections, theory-based suggestions, and MIDI and PDF export.checked 7 Oct 2026
- Contributions
- The maker says 50% of contributions go to musical charities or nonprofits, with the Detroit Youth Choir named as an example.checked 7 Oct 2026
- Import and export
- The app interface lists MIDI and MusicXML import and export, plus PDF and audio export.checked 7 Oct 2026
- Learning
- Theory Academy offers interactive lessons, guided tutorials, exercises, and topics from intervals to voice leading.checked 7 Oct 2026
- Purpose
- Interactive Music Theory Lab teaches music theory through hands-on chord building, progressions, melody composition, and songwriting.checked 7 Oct 2026
- Scales
- Scale Explorer includes more than 100 scales and displays patterns on piano and fretboard.checked 7 Oct 2026
- Songwriting scope
- The maker says the app provides guidance and suggestions but is not meant to write the song for the user.checked 7 Oct 2026
- Support
- The maker directs users to GitHub for feature requests and bug reports and says there are bugs.checked 7 Oct 2026
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