Escalas Alteradas

This is one freaky scale. I thought a little background on it would be helpful.  Good luck with Lesson 2! 

Diatonic Formula Representation
Formula: 1 b2 b3 b4 b5 b6 b7

Alternative Formula Representation
Formula: 1 b9 #9 3  b5 #5 b7

The altered scale is the seventh mode of the melodic minor scale - an altered scale shares the same notes as a melodic minor scale a major 7th below.

Examples: C melodic minor and B altered, A melodic minor and G# altered.

Two formula representations are given above, the first is strictly correct in a diatonic sense however the second is more useful in that it clearly shows how an altered scale can be used over an altered chord. An altered chord is a dominant seventh chord that contains any or any combination of the following:- b5, #5, b9, #9. Here are some examples of altered chords:

C7(b5)
G7(#9)
A7(b5,b9)
Bb7(b9,#9)

Sometimes the chord symol 'alt' is used (example: C7alt). This means the performer can interpret this chord using any combination of the altered tones (b5, #5, b9, #9) that they wish.

Uses for Improvisation
* Any altered dominant chord
* Any dominant chord leading to a minor key

Practise Chord Sequences

Sequence 1
||: C7(#5,#9)    |              | Fm(maj7)     |            :|| Fm(maj7)
C altered........................F melodic minor..............|

Sequence 2
||: Dm7          | G7alt        | Cmaj9        |            :|| Cmaj9
D dorian..........G altered......C major......................|


Great explanation! 

Example of modes for C Minor Melodic:
1. C min(Maj7)  - Minor Melodic
2. D min7(b5) - Dorian b2
3. Eb Maj 7(#5) - Lydian Augmented 
4. F7 (#11) - Lydian b7
5. G9(b13) - Mixolydian b6
6. Amin9(b5) - Locrian #2
7. B7alt - Altered scale 

My F7 altered: https://soundcloud.com/myjazzart/f-altered/s-Lx8Tl