Musical Scales

As I wrote in my introductory post, there are well known rules for building scales, at least for western music. There is a very intersting introductory material here.

Actually, the link above describes only the major and minor modes, but there are really 7 of them defined by the Greeks. They are:

1. Ionian (major),
   
2. Dorian,
   
3. Phrygian,
   
4. Lydian,
   
5. Mixolydian,
   
6. Aeolian (minor) and
   
7. Locrian

The origin of these modes can be read here. It is also interesting to have a look at the Wikipedia entry for musical modes.

These rules could be easily coded in order to produce melodic sequences on a given key.