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August 30, 2023 01:25
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Get names for rank-2 musical intervals
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import re | |
def pprint(interval_string): | |
interval_string = re.sub(r"dP", r"d", interval_string) | |
interval_string = re.sub(r"dm", r"d", interval_string) | |
interval_string = re.sub(r"AP", r"A", interval_string) | |
interval_string = re.sub(r"AM", r"A", interval_string) | |
return interval_string | |
def interval_to_quality(interval): | |
A1, d2 = interval | |
if d2 >= 7: | |
return interval_to_quality((A1 - 12, d2 - 7)) | |
if d2 < 0: | |
return interval_to_quality((A1 + 12, d2 + 7)) | |
if interval in [(0, 0), (5, 3), (7, 4), (12, 7)]: | |
return "P" | |
if interval in [(1, 1), (3, 2), (8, 5), (10, 6)]: | |
return "m" | |
if interval in [(2, 1), (4, 2), (9, 5), (11, 6)]: | |
return "M" | |
if d2 == 0 and A1 < 0: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 0 and A1 > 0: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 1 and A1 < 1: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 1 and A1 > 2: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 2 and A1 < 3: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 2 and A1 > 4: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 3 and A1 < 5: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 3 and A1 > 5: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 4 and A1 < 7: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 4 and A1 > 7: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 5 and A1 < 8: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 5 and A1 > 9: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
if d2 == 6 and A1 < 10: | |
return "d" + interval_to_quality((A1 + 1, d2)) | |
if d2 == 6 and A1 > 11: | |
return "A" + interval_to_quality((A1 - 1, d2)) | |
def interval_to_name(interval): | |
A1, d2 = interval | |
ordinal = str(d2 + 1) | |
quality = interval_to_quality(interval) | |
name = quality + ordinal | |
name = pprint(name) | |
return name | |
print(interval_to_name((25, 12))) # Returns "AAAA13". |
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