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8 changes: 4 additions & 4 deletions mingus/core/progressions.py
Original file line number Diff line number Diff line change
Expand Up @@ -278,12 +278,12 @@ def substitute_harmonic(progression, substitute_index, ignore_suffix=False):
res = []
(roman, acc, suff) = parse_string(progression[substitute_index])
if suff == "" or suff == "7" or ignore_suffix:
for subs in simple_substitutions:
r = subs[1] if roman == subs[0] else None
for (subs_0, subs_1, *subs_len) in simple_substitutions:
r = subs_1 if roman == subs_0 else None
if r == None:
r = subs[0] if roman == subs[1] else None
r = subs_0 if roman == subs_1 else None
if r != None:
suff = suff if suff == "7" else ""
suff = suff if suff == '7' else ''
res.append(tuple_to_string((r, acc, suff)))
return res

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