def beats_to_voice(beats):
result = Voice()
for beat in beats:
cur_beat = Beat()
tones = re.findall(r'(\\|/)?([0-7\*])(\,|\')*', beat)
for group_digit in tones:
cur_beat.add_tone(digit_to_tone(group_digit))
result.add_beat(cur_beat)
return result
