34. Escala Menor Melodica

SOURCE : http://www.jazclass.aust.com/scales/scamelm.htm

Description of the Melodic minor scale   A melodic minor scale consists of 7 different notes.
The intervals from note to note are :
tone - semitone - tone - tone - tone - tone - semitone The scale can also be described as two tetrachords separated by one whole tone.

• one minor tetrachord : tone - semitone - tone
  
• one major tetrachord : tone - tone - semitone

The two tetrachords for the C melodic minor scale are :
(minor tetrachord) C - D - Eb - F <-- tone --> G - A - B - C (major tetrachord)
 

The key signature for the melodic minor scale is the same as its related major scale which has its its tonic note 3 semitones above.
For example the C melodic minor scale is related to the Eb major scale, and shares that scale's key signature (3 flats).