QUOTE (Pedja Simovic @ May 31 2010, 06:31 PM)
Glad you enjoyed those answers
Let me try to answer all your questions.
1) How to recognize the key of a song based on it's progression and not by it key sign?
You should look for the starting chord in the chord progression, try to find cadences in the chord progression, figure out the form of the piece and see what type of ending is there harmony wise.
2) Understand the difference between minor and harmonic minor.
The difference is in only one note. Natural minor has minor 7th interval from root of the scale while Harmonic minor has major 7th. That one note difference makes a lot of difference. For starters, Natural minor has I min IV min and V min , in B min that would be B min E min F# min. For Harmonic minor we have I min IV min and V (major!). So the essential difference there is that V is different in those two scales and should be used as focus point when analyzing minor chord progressions.
3) What is the chord harmony for B harmonic minor I-II-III-IV-V-VI-VII :Bm-?-? Em-F#-?=?
I could tell you this but it would be more useful for you to figure this out by writing down the scale and then working out triads and 4 part harmony in it! Here is Harmonic minor formula, everything in relationship to root : Root, Maj 2nd, Min 3rd, Perfect 4rh, Perfect 5th, Min 6th, Maj 7th, Octave. IF you use whole and half step system, we get this : Root , Whole, Half, Whole, Whole, Half, Whole and Half(very important) and Half! Notice how between bVI scale degree and VII there is minor 3rd interval or whole + half step distance.
Let me know if you got more questions!
ad 1) To find the cadences I should know the harmony "formula"that is based on scale right? E.g. for maj7 I know it is I-ii-iii-IV-V-vi-vii so for Cmaj7 this will be: Imaj IImin IIImin IVMaj V7 VIimin VIIdim. So if I want to find cadences I must know all the harmony scale formula
still very difficult to do without knowing its minor formula
ad 2) I understand your explanation.
So natural A minor formula is: : A-B-C-D-E-F-G-A. (1,2,b3,4,5,b6,b7) w(hole), h, w, w, h, w, w
The A harmonic minor scale is : A-B-C-D-E-F-G#-A : (1,2,b3,4,5,b6,7) w, h, w, w, h, 1,5, h
Difference is raised the 7 th note by a half step
ad 3) For triads it is
Emaj = E-G#-B
Fmaj = F-A-C
So the formula for triads is: Imin - IIdim- IIIaug - Ivmin-Vmaj-VImaj-VIIdimo
so for Bm the progession would be like: Bm-C#dim-Daug- Em-F#-G-A#/Bbdim
Should I best use B harmonic min scale or Bm pentatonic scale over this progression?