hi all what is the difference between blues scales and regular scales? that is one question. also like in the regular scales, if you know one scale then you can derive the others too by a simple arithmetic progression kind of a calculation. is it true for blues scales also? another question is how do you technically define jazz music. is it because they jazz it up...ie play a normal song in a slightly spicier and more intricate way? be delighted to know if someone can throw some light on this!!!!!!!!!