Jazz theory you can hear
Practise the changes, not the page.
Interactive trainers for the progressions that run through every standard — the ii–V–I, turnarounds, rhythm changes and the blues. Pick a form and a key: the tool spells the chords, draws the chord-scales on piano and guitar, and loops a vamp so you can play along.
Where to start
Five tools, twelve keys each.
Each hub works the same way — chords, chord-scales and a loopable vamp on piano and guitar.
Practice Radio
An endless stream of changes through all twelve keys — chord and scale shown live. Press play and blow.
Start the radio → LivePractice tools
The progression families: ii–V–I, turnarounds, rhythm changes, jazz blues and Coltrane changes.
Open the hub → LiveScales & modes
Every mode and altered scale drawn on the keyboard and the fretboard, in any key.
Open the hub → LiveLearn
Plain explanations of what a ii–V–I is, how chord-scale theory works, and how to practise in twelve keys.
Read the guides → LiveArpeggios
Chord tones under the fingers — every chord type, every key, both instruments.
Open → LiveChord voicings
Rootless, shell and drop-2 voicings you can actually reach, written out in every key.
Open → LiveAll tools
One flat index of everything on the site, for when you know what you are after.
Browse →The point of the thing
Jump straight to your key.
The ii–V–I in all twelve major keys. Learn it in one, then move it — that is the whole practice.
Why it is built this way
A tool beats an article.
Hear it, don’t read it
Every page loops a vamp and spells the chord-scales as you go. Theory that stays on the page never reaches your hands.
All twelve keys, always
Nothing here exists in C only. Each tool transposes, because the keys you avoid are the ones worth practising.
Theory and original audio only
No lead sheets, melodies or transcriptions of copyrighted standards — the forms themselves are common property, and that is what we teach.