available tension
table:Extensions
C-dur Note Category
D
E'
G'
H'
Several extension notes can be used in a certain chord.
1つのコード内に複数のテンションの混在が可能。
Several extension notes which have the same degree can NOT be used in a certain chord. (e.g. 9th, #9th, ♭9th cannot be used at the same time.)