Practise standard chords, intervals and key signatures with this simple, no-nonsense music theory reference and quiz. Development supervised by a musicologist.

Always free, ad-free version.

Reference:
* Use treble, bass, tenor, alto, soprano, and baritone clefs.
* See chords and key signatures displayed with high quality graphics.
* Hear chords played.
* Choose any starting note.
* Choose chord inversion.
* All possible key signatures available.
* Standard chords include seventh and augmented sixth chords as well as triads.

Quiz:
* Test your knowledge and speed with quizzes.
* Chords quiz.
* Intervals quiz (full version only).
* Key signatures quiz (full version only).

此版本中的新功能：