def test_progression_midi():
assert ChordProgression.from_string("""C Fm G7""").midi() == [
[
note_to_midi(("C", 4)),
note_to_midi(("E", 4)),
note_to_midi(("G", 4))
],
[
note_to_midi(("F", 4)),
note_to_midi(("G#", 4)),
note_to_midi(("C", 5))
],
[
note_to_midi(("G", 4)),
note_to_midi(("B", 4)),
note_to_midi(("D", 5)),
note_to_midi(("F", 5)),
],
]
def midi(self) -> List[int]:
"""
Returns the list of MIDI note values in the chord.
>>> Chord.from_name("Amajor7").midi()
[69, 73, 76, 80]
"""
return [
note_to_midi(self.root.transpose(semitone)) for semitone in self.semitones
]
def pitch(self) -> float:
"""Returns the absolute pitch of the note in Hz.
Examples (equalities are approximate):
* `Note("A", 4).pitch() == 440.0`
* `Note("A", 0).pitch() == 27.5`
* `Note("C", 4).pitch() == 261.62556`
"""
from jchord import midi
return midi.midi_to_pitch(midi.note_to_midi(self))
def pitch(self) -> float:
"""Returns the absolute pitch of the note in Hz.
>>> Note("A", 4).pitch()
440.0
>>> Note("A", 0).pitch()
27.5
>>> Note("C", 4).pitch()
261.6255653005986
"""
from jchord import midi
return midi.midi_to_pitch(midi.note_to_midi(self))
def test_note_to_midi_invalid_note():
with pytest.raises(InvalidNote):
note_to_midi(Note("bA", 0))
def test_note_to_midi(note, octave, midi):
assert note_to_midi(Note(note, octave)) == midi
assert midi_to_note(midi) == Note(note, octave)
def __sub__(self, other):
"""Returns the number of semitones between the two notes"""
from jchord import midi
return midi.note_to_midi(self) - midi.note_to_midi(other)
def midi(self) -> List[int]:
"""Returns the list of MIDI note values in the chord."""
return [
note_to_midi(self.root.transpose(semitone))
for semitone in self.semitones
]