Canonical Chord Names

[yaph]

Currently different chord naming conventions are used on the site. The full list of chord names in use is at https://ukealong.com/chords/

The same chords (the same notes being played) may have different names. Only one variant should be used and existing chord names changed accordingly. Although C# and Db consist of the same pitches, these chords belong to different keys, thus the distinction makes sense.

Leave add9 chords as they are. They are not the same as 9 chords. On the ukulele only four different notes can be played together, but they could be 1, 5, 7, 9, which is not an add9 chord.

Below are some examples of different chord naming conventions:

• https://ukealong.com/chord/amm7/
• https://ukealong.com/chord/ammaj7/
• https://ukealong.com/chord/g7+5/
• https://ukealong.com/chord/g7add9/

Below are some examples of ambiguous names:

• https://ukealong.com/chord/asus/
• https://ukealong.com/chord/fsus/
• https://ukealong.com/chord/gsus/

Tasks

• [x] Define rules that specify what variants to use as canonical names
• [x] Write code that changes existing chord names according to the rules and integrate it in import process
• [x] Replace ambiguous chord names

Rules

• Use add instead of + if a note is added to the chord.
• Use aug instead of + for augmented chords.

[yaph]

Chord names are canonicalized in clean_data.py script.