What do
you play?Music tools for guitar, ukulele, bass, piano, trumpet and 7 folk instruments
Pick your instrument: 134 scales, chord finder, arpeggios and harmonizer, drawn on your neck or keyboard in all 12 keys. Then play progressions and standards with a band on the same instrument.
Guitar
Piano
OpenUkulele
OpenBass
OpenB♭ Trumpet
OpenStrings of the world
Chord finder, 134 scales, arpeggios and harmonizer for 7 folk instruments.Or start from what you need
Switch instrument inside any tool.
- Find a chord →27 chord types on guitar, open and barre shapes, filtered by fret range.
- Learn a scale →134 scales in 15 families, from pentatonics and modes to Japanese, Greek and Messiaen, with CAGED and 3-notes-per-string patterns.
- Write a song →Harmonize 95 scales, reharmonize with ii-V-I or secondary dominants, then build your own progression and export it to MIDI.
- Play a tune →2,549 standards with walking bass or montuno, and the scale and voicings of each chord lit up on the neck.
Not backing tracks.
Built for practice.
Play and study live: chord progressions across pop, rock, blues, jazz-soul, doo-wop, flamenco, classical, film and game music, plus jazz, Brazilian, Latin, blues, pop and country standards. While the backing plays, the neck shows the arpeggio, voicings and scale for each chord, in all 12 keys and 11 instruments.
If you find these tools useful, consider supporting the project
Play standards
with a band
Walking bass on jazz, a montuno engine on Latin, and the arpeggio, scale and voice-led voicings of every chord on the neck — in 12 keys and 11 instruments. Correct a chart or add a new standard with the community.
Jazz standards
1,775 tunes with generated walking bass; chord-scale mode lights up the improv scale, arpeggio and voicings of the chord you’re on in real time.
Latin standards
Montuno engine with 4 variations and octave, tenth or thirteenth harmonizations, locked to the song’s 2-3 or 3-2 clave.
ExploreFlamenco palos
Soleá, Bulerías, Alegrías, Tangos and 5 more: compás with palmas, capo, the flamenco mode and Andalusian-cadence reharmonizations.
ExploreFlamenco licks
Tab synced with the fretboard, 50–240 BPM over the compás.
PracticeGuitar montunos & tumbaos
Tab synced with the fretboard, 3 positions, any key, son clave you can flip.
Practiceii-V-I for trumpet
From hearing the harmony and guide tones to improvising, in 12 keys.
Practice40 progressions
Each in 12 keys, with ii-V-I and secondary-dominant reharmonization.
Play