From the brightest to the darkest:
Lydian = 1 2 3 4# 5 6 7 (8)
Ionian = 1 2 3 4 5 6 7 (8) (= major scale)
Mixolydian = 1 2 3 4 5 6 b7 (8)
Dorian = 1 2 b3 4 5 6 b7 (8)
Aeolian = 1 2 b3 4 5 b6 b7 (8) (= natural minor scale)
Phrygian = 1 b2 b3 4 5 b6 b7 (8)
Locrian = 1 b2 b3 4 b5 b6 b7 (8)
How difficult is that ? You just need to sit in front on of a keyboard and play them until you get their sound in your ear, and then play them on your bass until you get them under your fingers.
Instead of thinking them as the notes of a major scale starting from another note (eg. dorian is C major starting from D, mixolydian is C major starting from G, etc...) it is much more useful to learn and practice the various modes for the same tonal center: eg G lydian, G ionian, G mixolydian, G dorian, etc... And to notice how the location of the half tones move towards the lower part of the mode as one progresses (in the order given above), making the modes sounding darker as you progress.
Ideally, it is good to be able to play all of them in all 12 keys There is no better way to learn to know your fingerboard in depth. If that seems too much to you, you can concentrate on playing (and hearing !) the most used modes (ionian, mixolydian, dorian, lydian) in the keys that come up most frequently.
Once you are done with this, you can proceed with the modes of the melodic minor scale and explore some alternate sound:
1 2 3 4# 5# 6 7 (8)
1 2 3 4# 5 6 b7 (8)
etc.
Lydian = 1 2 3 4# 5 6 7 (8)
Ionian = 1 2 3 4 5 6 7 (8) (= major scale)
Mixolydian = 1 2 3 4 5 6 b7 (8)
Dorian = 1 2 b3 4 5 6 b7 (8)
Aeolian = 1 2 b3 4 5 b6 b7 (8) (= natural minor scale)
Phrygian = 1 b2 b3 4 5 b6 b7 (8)
Locrian = 1 b2 b3 4 b5 b6 b7 (8)
How difficult is that ? You just need to sit in front on of a keyboard and play them until you get their sound in your ear, and then play them on your bass until you get them under your fingers.
Instead of thinking them as the notes of a major scale starting from another note (eg. dorian is C major starting from D, mixolydian is C major starting from G, etc...) it is much more useful to learn and practice the various modes for the same tonal center: eg G lydian, G ionian, G mixolydian, G dorian, etc... And to notice how the location of the half tones move towards the lower part of the mode as one progresses (in the order given above), making the modes sounding darker as you progress.
Ideally, it is good to be able to play all of them in all 12 keys There is no better way to learn to know your fingerboard in depth. If that seems too much to you, you can concentrate on playing (and hearing !) the most used modes (ionian, mixolydian, dorian, lydian) in the keys that come up most frequently.
Once you are done with this, you can proceed with the modes of the melodic minor scale and explore some alternate sound:
1 2 3 4# 5# 6 7 (8)
1 2 3 4# 5 6 b7 (8)
etc.