Interval names, symbols, example notes, and audio.
Music Reference and Theory
Find details on scales, chords, arpeggios, chord progressions and how
to play these on the guitar. All guitar references can be suited to
standard or alternate tunings.
Knowledge Drills
Test your knowledge and strengthen your weak points with these music knowledge drills.
Easy
Chord Drills - Notes in chords
Interval Drills - Next note
Scale Drills - Notes in scale
Chord Drills - Chord by notes
Scale Drills - Scale by notes
Intermediate
Chord Drills - Chord by notes
Scale Drills - Scale by notes
Chord Drills - Notes in chords
Scale Drills - Notes in scale
Hard
Chord Drills - Notes in chords
Scale Drills - Notes in scale
Chord Drills - Chord by notes
Scale Drills - Scale by notes
What's New
February 28, 2026
About the Algorithms: Chords
I'm starting a brief series of explanations on how things works behind the scenes on the site. The first installment here is on how chords are defined and how various aspects are derived from the few bits of data that need to be defined manually.
Even if you don't code, this may be an interesting glimpse into how I've taught the code to understand music in ways similar to how people can learn certain aspects of music theory.
About the Algorithms: ChordsFebruary 23, 2026
About Page
Learn a little about me and my motivation for this site in my new about page.