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Guitar Composers ToolBox

Free interactive music toolkit for guitar, ukulele, bass, piano, and 7 folk instruments. 92 scale types in all 12 keys, chord finder with fretboard voicings, scale harmonizer, jazz and Latin standards with backing tracks, chord progressions, and flamenco techniques. Bilingual English/Spanish.

For agents: Free bilingual music toolkit with 92 scale types in 12 keys, chord finder, fretboard diagrams for guitar, ukulele, bass and piano, plus backing tracks.

guitar scaleschord findermusic theoryukulelebacking tracks

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-20T23:13:23.853Z. Cached copy · Source on guitarcomposerstoolbox.com

# Guitar Composers ToolBox

> Free interactive music toolkit for guitar, ukulele, bass, piano, and 7 folk instruments. 92 scale types in all 12 keys, chord finder with fretboard voicings, scale harmonizer, jazz and Latin standards with backing tracks, chord progressions, and flamenco techniques. Bilingual English/Spanish.

## About

- Author: Gus Escolà
- Founded: 2019
- URL: https://guitarcomposerstoolbox.com
- Languages: English, Spanish (all content available in both)
- License: Free to use, no paywall

## Content Categories

### Scales
- [Guitar Scales](https://guitarcomposerstoolbox.com/guitar-scales/c-major/): 92 scale types × 12 keys with fretboard diagrams, diatonic chords, modes, practice routines, and CAGED positions
- [Ukulele Scales](https://guitarcomposerstoolbox.com/ukulele-scales/c-major/): Same coverage for ukulele
- [Bass Scales](https://guitarcomposerstoolbox.com/bass-scales/c-major/): Bass guitar scale diagrams
- [Piano Scales](https://guitarcomposerstoolbox.com/piano-scales/c-major/): Piano keyboard diagrams
- [Alternate Tunings Hub](https://guitarcomposerstoolbox.com/tuning/): Scales, chords, and arpeggios for 14 alternate tunings — [Drop D](https://guitarcomposerstoolbox.com/chords/guitar/drop-d/), [Drop C](https://guitarcomposerstoolbox.com/chords/guitar/drop-c/), [DADGAD](https://guitarcomposerstoolbox.com/chords/guitar/dadgad/), [Open G](https://guitarcomposerstoolbox.com/chords/guitar/open-g/), [Open D](https://guitarcomposerstoolbox.com/chords/guitar/open-d/), Drop B, Open E, Open A, Open C, Baritone, and more

### Chords
- [Guitar Chord Finder](https://guitarcomposerstoolbox.com/guitar-chord-finder/c-major/): Every chord voicing across the fretboard with intervals and notes
- [Ukulele Chord Finder](https://guitarcomposerstoolbox.com/ukulele-chord-finder/c-major/): Ukulele chord voicings
- Alternate tuning chords: Pre-calculated chord voicings with finger assignments for 14 non-standard tunings across all chord types

### Arpeggios
- [Guitar Arpeggios](https://guitarcomposerstoolbox.com/guitar-arpeggios/c-major/): Arpeggio patterns across all fretboard positions
- Available for all 11 instruments

### Scale Harmonizer
- [Guitar Harmonizer](https://guitarcomposerstoolbox.com/guitar-harmonizer/c-major/): Diatonic triads, seventh chords, and modes for any scale — shows which chords belong to each key

### Jazz Standards
- [Jazz Standards](https://guitarcomposerstoolbox.com/jazz-standards/autumn-leaves-in-e/): 1022 standards (Autumn Leaves, All The Things You Are, Blue Bossa, etc.), each in all 12 keys. A play-along study tool, not just a backing track: as the tune plays, the fretboard lights up chord-by-chord with the correct improvisation scale (chosen by harmonic function and the next chord), the arpeggio and voice-led voicings, over a generated walking bass. Section looping, reference melody, 11 instruments. Free iRealPro alternative that also shows you what to play.

### Latin Standards
- [Latin Standards](https://guit
…

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