Compare
Altered vs Lydian Dominant
Two melodic-minor modes that both work over V7alt. Altered handles bIIalt substitution; Lydian dominant handles unaltered V7.
Altered
R
♭2
2
♭3
3
4
♭5
5
♭6
6
♭7
7
Lydian Dominant
R
♭2
2
♭3
3
4
♭5
5
♭6
6
♭7
7
What's different
Only in Altered
♭2♭3♭6
Only in Lydian Dominant
256
In both
R3♭5♭7
Other comparisons