Musical intervals and chords

Several practice sets are provided: minor thirds, major thirds, minor triads, major triads, diminished triads and augmented triads.

There are 13 'base keys' : C, Db, D, Eb, E, F, Gb/F#, G, Ab, A, Bb and B. That said, some of the notes seem artificial in these practice lists, with many double-flats. The reason is because when a diminished chord or an augmented chord is built upon the normal 'key' chromatic notes, or one of the 7 diatonic notes native to that key, then this invariably leads to odd notes if you adhere to strict spellings.

Some examples include:
Cb to Ebb: This appears when spelling a vii°7 in Gb Major (F−Ab−Cb−Ebb)

Fb to Abb: This appears when spelling a vii°7 in Db Major (C−Eb−Gb−Bbb), if one were to continue the stack upwards from the Fb (which is the minor third of Db). The reason this is included is because of the spellings used in classical music when playing in a 'mirror' key. So Db major is the usual key, but the music might modulate temporary to a minor mood, but classically you still have a base note of Db, hence you are playing in Db minor ( which doesn't normally exist - it should be C# , thge relative minor of E major. )

Bbb to Dbb: This is the "top floor" of the staircase starting from C natural (C−Eb−Gb−Bbb−Dbb).


The situation would be far worse if further 'theoretical' keys were included, like Cb or G#. ; For example, a diminished seventh built on Cb would contain the notes: Cb, Ebb, Gbb, Bbbb ; as such, notes generated from artifical keys are not found in these practice lists.

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Difficulty Levels

All lists in this system are unaffected by the difficulty setting.