harmony.py

harmony.py

blues_m = ['T', 'b3', 'P4', 'b5', 'P5', 'b7']

mh = ['T', 'M2', 'b3', 'P4', 'P5', 'b6', 'M7']

mm = ['T', 'M2', 'b3', 'P4', 'P5', 'P6', 'M7']

m = ['T', 'M2', 'M3', 'P4', 'P5', 'P6', 'M7']





def gam(gamme, ton,  degre=0):

	
	chroma = ['c', 'c#', 'd', 'eb', 'e', 'f', 'f#', 'g', 'ab', 'a', 'bb', 'b']

	relat = {'T':0, 'b2':1, 'M2':2, 'b3':3, 'M3':4, 'P4':5, 'b5':6, 'P5':7, 'b6':8, 'P6':9, 'b7':10, 'M7':11}	
	
							
	index_ton = chroma.index(ton)
	
	chroma_ord = chroma[index_ton:]+chroma[:index_ton]
	
	r = []
	
	c = 0
	
	for i in gamme:
		
		
		
		rel = relat[i]
		
		ecart = 0
		
		if rel != 0:
		
			ecart = (rel - c)/2
			
			if ecart == 1:
				
				ecart = '+ 1'
			
						
			elif ecart == 0.5:
				
				ecart = '+ 1/2'			
				
			elif ecart == 1.5:
				
				ecart = '+ 1 1/2'
				
			c = rel
		
		x = (i, chroma_ord[rel].capitalize(), ecart)
		
		r.append(x)
		
		
		
	return r
	
	
	
	
	
def harmo(gamme, ton,  degre=0):
	
	r = gam(gamme, ton)
	
	note = [i[1] for i in r]
	
	ecart = [i[2] for i in r]
	
	if degre > 0:
		
		note = note[degre-1:]+note[:degre-1]
		
		ecart = ecart[degre:]+ecart[:degre-1]
		
	print (note)
	
	print (ecart)
	
	
		
		
		
		
		
if __name__ == '__main__':
	
	import random
	
	chroma = ['c', 'c#', 'd', 'eb', 'e', 'f', 'f#', 'g', 'ab', 'a', 'bb', 'b']
	
	gamme = {'mh':mh, 'mm':mm, 'mb':blues_m, 'm':m}
	
	t = random.choice(chroma)
	
	gg = random. choice(('mh','mm','mb','m'))
	
	g = gamme[gg]
	
	r = gam(g, t)
	
	print('Gamme de {0} {1}'.format(t, gg))
	
	print('\n')
	
	for i in r:
		
		print (i)