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Interactive Music Theory Lab

imtl.net

Free plan Web
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Spec score 7.6 #13 of 27 in Music Theory Software

What it is

Interactive Music Theory Lab is a free web app for learning and applying music theory. Chord Lab offers an interactive chord builder, chord library, piano keyboard, staff notation, voicings, and inversions. Scale Explorer covers more than 100 scales and maps their patterns on piano and fretboard. Theory Academy provides interactive lessons, guided tutorials, exercises, and subjects ranging from intervals to voice leading. Composition Studio lets users arrange progressions and song sections by drag and drop, receive theory-based suggestions, and export MIDI or PDF. The interface also lists MIDI and MusicXML import and export, along with PDF and audio export. Users can upload MP3, WAV, OGG, M4A, or FLAC files for chord-progression detection; clear recordings work better than complex mixes. The service requires no account and includes progress tracking. It offers guidance rather than writing songs for users, and the maker notes that bugs exist.

Spec sheet

Purpose
Interactive Music Theory Lab teaches music theory through hands-on chord building, progressions, melody composition, and songwriting.Read 7 Oct 2026 · imtl.net
Audience
The maker describes it as intended for aspiring musicians and songwriters, including people who want to understand how music works.Read 7 Oct 2026 · imtl.net
Support
The maker directs users to GitHub for feature requests and bug reports and says there are bugs.Read 7 Oct 2026 · imtl.net
Account requirement
The site says it is free to use and requires no account.Read 7 Oct 2026 · imtl.net
Audio analysis
Users can upload audio files to detect chord progressions; supported formats include MP3, WAV, OGG, M4A, and FLAC.Read 7 Oct 2026 · imtl.net
Audio limits
The site says chord detection works best on clear recordings and may be less accurate with complex mixes.Read 7 Oct 2026 · imtl.net
Chord tools
Chord Lab provides an interactive chord builder, chord library, piano keyboard and staff notation, voicings, and inversions.Read 7 Oct 2026 · imtl.net
Composition
The Composition Studio supports drag-and-drop progressions, song sections, theory-based suggestions, and MIDI and PDF export.Read 7 Oct 2026 · imtl.net
Contributions
The maker says 50% of contributions go to musical charities or nonprofits, with the Detroit Youth Choir named as an example.Read 7 Oct 2026 · imtl.net
Import and export
The app interface lists MIDI and MusicXML import and export, plus PDF and audio export.Read 7 Oct 2026 · imtl.net
Learning
Theory Academy offers interactive lessons, guided tutorials, exercises, and topics from intervals to voice leading.Read 7 Oct 2026 · imtl.net
Scales
Scale Explorer includes more than 100 scales and displays patterns on piano and fretboard.Read 7 Oct 2026 · imtl.net
Songwriting scope
The maker says the app provides guidance and suggestions but is not meant to write the song for the user.Read 7 Oct 2026 · imtl.net

Plans and prices

Free Free Free to use · No account required Read 7 Oct 2026 · imtl.net

Every Interactive Music Theory Lab plan and price →

Strong points and limits

Strong points

  • Free web access with no account required
  • More than 100 scales with piano and fretboard patterns
  • Chord building includes voicings and inversions
  • MIDI and MusicXML import and export
  • Progress tracking and interactive exercises

Limits

  • Chord detection may be less accurate on complex mixes
  • The maker says bugs exist
  • Guidance does not write the song for users

Who it suits

It suits aspiring musicians and songwriters who want interactive theory lessons, harmony tools, composition exercises, and progress tracking in a browser. It is also relevant to learners exploring chords, scales, notation, and audio-based chord detection.

Verdict

Interactive Music Theory Lab combines structured lessons with chord, scale, notation, composition, and audio-analysis tools. Its free, no-account web access makes it suitable for theory practice and guided songwriting work.

Where Specifiction places it

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