def _generate_phrase(self, phrase_id):
phrase= []
actual_phrase_length= 0
phrase_length= self.ec.phrase_length
input= AcumulatedInput()
input.phrase_id= phrase_id
first_start= None
while actual_phrase_length < phrase_length:
result= PartialChord()
self.chord_maker.next(input, result, [])
chord= result.finish()
if first_start is None: first_start= chord.start
chord.start-= first_start
phrase.append(chord)
actual_phrase_length+= chord.duration
if phrase[-1].end > phrase_length:
phrase[-1].duration= phrase_length-phrase[-1].start
return phrase
