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chords.py
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chords.py
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from typing import Union
from common import UP, DOWN, NAMES, NAME_TO_NOTE
from interval import *
def interpret(root: Union[int, str]) -> list[int]:
'''Take a root as a string, or an integer.
'''
octaves = ['1', '2', '3', '4', '5', '6', '7', '8', '9']
if type(root) == str:
if len(root) == 1 and root in NAMES:
return [NAME_TO_NOTE.get(root + '5')]
if len(root) == 2 and root[0] in NAMES:
if root[1] in ['#', 'b']:
return [NAME_TO_NOTE.get(root + '5')]
elif root[1] in octaves:
return [NAME_TO_NOTE.get(root)]
if len(root) == 3 and root[0] in NAMES:
if root[1] in ['#', 'b'] and root[2] in octaves:
return [NAME_TO_NOTE.get(root)]
elif type(root) == int:
return [root]
else:
raise ValueError(f'Bad input: {root}')
def minor(root: Union[int, str]) -> list[int]:
notes = interpret(root)
notes.append(minor_third(notes[0]))
notes.append(perfect_fifth(notes[0]))
return notes
def major(root: Union[int, str]) -> list[int]:
notes = interpret(root)
notes.append(major_third(notes[0]))
notes.append(perfect_fifth(notes[0]))
return notes
def diminished(root: Union[int, str]) -> list[int]:
notes = interpret(root)
notes.append(minor_third(notes[0]))
notes.append(diminished_fifth(notes[0]))
return notes
def augmented(root: Union[int, str]) -> list[int]:
notes = interpret(root)
notes.append(major_third(notes[0]))
notes.append(augmented_fifth(notes[0]))
return notes
def minor6(root: Union[int, str]) -> list[int]:
notes = minor(root)
notes.append(major_sixth(notes[0]))
return notes
def major6(root: Union[int, str]) -> list[int]:
notes = major(root)
notes.append(major_sixth(notes[0]))
return notes
def minor7(root: Union[int, str]) -> list[int]:
notes = minor(root)
notes.append(minor_seventh(notes[0]))
return notes
def major7(root: Union[int, str]) -> list[int]:
notes = major(root)
notes.append(major_seventh(notes[0]))
return notes
def dominant7(root: Union[int, str]) -> list[int]:
notes = major(root)
notes.append(minor_seventh(notes[0]))
return notes
def halfdim7(root: Union[int, str]) -> list[int]:
notes = diminished(root)
notes.append(minor_seventh(notes[0]))
return notes
def fulldim7(root: Union[int, str]) -> list[int]:
notes = diminished(root)
notes.append(diminished_seventh(notes[0]))
return notes
def minor7_flat9(root: Union[int, str]) -> list[int]:
notes = minor7(root)
notes.append(minor_ninth(notes[0]))
return notes
def major7_flat9(root: Union[int, str]) -> list[int]:
notes = major7(root)
notes.append(minor_ninth(notes[0]))
return notes
def dominant7_flat9(root: Union[int, str]) -> list[int]:
notes = dominant7(root)
notes.append(minor_ninth(notes[0]))
return notes
def minor7_sharp9(root: Union[int, str]) -> list[int]:
notes = minor7(root)
notes.append(augmented_ninth(notes[0]))
return notes
def major7_sharp9(root: Union[int, str]) -> list[int]:
notes = major7(root)
notes.append(augmented_ninth(notes[0]))
return notes
def dominant7_sharp9(root: Union[int, str]) -> list[int]:
notes = dominant7(root)
notes.append(augmented_ninth(notes[0]))
return notes
def minor9(root: Union[int, str]) -> list[int]:
notes = minor7(root)
notes.append(major_ninth(notes[0]))
return notes
def major9(root: Union[int, str]) -> list[int]:
notes = major7(root)
notes.append(major_ninth(notes[0]))
return notes
def dominant9(root: Union[int, str]) -> list[int]:
notes = dominant7(root)
notes.append(major_ninth(notes[0]))
return notes
def major69(root: Union[int, str]) -> list[int]:
notes = major6(root)
notes.append(major_ninth(notes[0]))
return notes
def minor11(root: Union[int, str]) -> list[int]:
notes = minor9(root)
notes.append(major_eleventh(notes[0]))
return notes
def major_sharp11(root: Union[int, str]) -> list[int]:
notes = major9(root)
notes.append(augmented_eleventh(notes[0]))
return notes
def invert(chord: list[int], times:int=1, direction:str=UP):
if direction == UP:
for _ in range(times):
chord = chord[1:] + [octave(chord[0])]
elif direction == DOWN:
for _ in range(times):
chord = [octave(chord[-1], DOWN)] + chord[:-1]
return chord