Description
OtoTheory helps guitarists write songs and solos.
Enter a chord progression and the app analyzes it to suggest the best key and scale. With a visual fretboard and scale explanations, even beginners can learn theory intuitively.
For DAW users, OtoTheory streamlines the pre-production workflow. Build a progression and export MIDI with Chord Track, guide tones, and bass track (with Scale Guides). Save your own progressions in My Sketches, and favorite shapes in My Forms.
【Perfect For】
・Guitarists who want to write songs but find theory challenging
・Beginners who want to solo but don't know which notes to use
・DTM users who want to prep on their phone before DAW work
・Acoustic players who need capo position suggestions
・Learners who want to study music theory while practicing
・Band leaders who want to propose chord progressions
【Free Features】
1. Chord Progression Builder (up to 12 slots)
・12-slot grid display, Root and chord type selection
・20 preset progressions (Canon, 50s, Pop, Jazz, etc.)
・Auto-loop playback, BPM adjustment (60-180)
・Multiple genre sound options
2. Scale Analysis
・Auto-analyzes progressions and suggests optimal key/scale
・Fit percentage display, degree notation (I, IV, V, etc.)
・Auto-detects patterns and cadences
3. Find Chords+
・Two-layer fretboard: degrees and chord names in two layers
・Scale explanations: mood, usage, and more
・Capo suggestions: easy-to-play positions (Open/Capo 3/Capo 5)
・Chord substitution: discover progression variations
4. Chord Library
・6 positions (Open/Root-6/Root-5/Root-4/Triad high/middle strings)
・Toggle degree/note display, play chords, one-tap add
5. My Sketches
・Free: 3 local saves (LRU), saves name/key/scale/BPM/chords
・One-tap recall & resume
【Pro Features (¥490/month)】
1. Section-based Progressions
・Manage by section (Verse, Chorus, Bridge, etc.)
・Add/delete/reorder sections, set repeat counts, change BPM per section
2. MIDI Export
・Chord Track, Section Markers, Guide Tones (3rd/7th + Scale Guide), Bass Track
・Works with Logic Pro, Cubase, Ableton, Studio One, etc.
・Dramatically reduces DAW work time
3. Unlimited My Sketches
・Unlimited saves, iCloud auto-sync, automatic backup
・Access from any device
4. Additional Presets
・30 more progressions (50 total): Jazz, Blues, Funk, Latin, etc.
【Key Features】
No Theory Knowledge Required - Create progressions without theory. Auto-analysis suggests optimal keys/scales. Learn through explanations.
Visual Understanding - Two-layer fretboard shows degrees and chord names. See chord tones and scale notes instantly.
Practical DAW Integration - Use phone-created progressions in professional production. MIDI export includes Chord Track, section markers, guide tones, and bass track.
Learn While Creating - Learn theory basics through explanations while creating progressions. Theory and practice combined.
Perfect for Acoustic Players - Capo suggestions propose easy-to-play positions.
【FAQ】
Q: Can I use it without music theory knowledge?
A: Yes. Auto-analysis suggests optimal keys/scales. Learn through explanations.
Q: How does DAW integration work?
A: Pro's "MIDI Export" exports Chord Track, section markers, guide tones, and bass track. Import to DAW immediately.
Q: What's the difference between Free and Pro?
A: Free: basic progression creation and analysis. Pro: section-based progressions, MIDI export, unlimited My Sketches (cloud sync), 50 presets.
【Support & Feedback】
Questions or suggestions? Contact us at [email protected]
Privacy Policy: https://ototheory.com/privacy
Terms of Service: https://ototheory.com/terms
Make music theory your ally and enjoy free songwriting and solo creation with OtoTheory.