def test_generalize_to_midi_range():
diatonic_pitches = ['C4','D4', 'E4', 'F4', 'G4', 'A4', 'B4']
diatonic_intervals = [1, 9/8, 5/4, 4/3, 3/2, 5/3, 15/8]
scale = Scale(reference_pitch=diatonic_pitches[0], reference_frequency=440/diatonic_intervals[5],
pitches_per_octave=len(diatonic_pitches), octave_interval=2,
specified_pitches=diatonic_pitches, init_ET=False)
assert scale[tuple(diatonic_pitches)] == [0, 0, 0, 0, 0, 0, 0]
scale.tune_all_by_interval(diatonic_intervals, diatonic_pitches)
assert scale['G4'] / scale['E4'] == 6/5
assert scale['F4'] / scale['D4'] == 32/27 # different minor third
assert scale['A4'] / scale['D4'] == 40/27 # flat fifth
assert min(scale.specified_pitches) == Scale.pitchname_to_pitch('C4')
assert max(scale.specified_pitches) == Scale.pitchname_to_pitch('B4')
scale.generalize_to_midi_range(diatonic_pitches)
assert min(scale.specified_pitches) == Scale.pitchname_to_pitch('C-1')
assert max(scale.specified_pitches) == Scale.pitchname_to_pitch('G9')
assert scale['G6'] / scale['E6'] == 6/5
assert scale['F0'] / scale['D0'] == 32/27
assert scale['A3'] / scale['D2'] == 40/27 * 2
def test_specified_pitches():
scale = Scale(specified_pitches=range(69, 69+12, 2), octave_interval=2.5)
assert list(scale.specified_pitches) == [69, 71, 73, 75, 77, 79]
assert scale['A#4'] == 440 # not specified
scale.specified_pitches = [69, 70, 71, 72, 73]
assert scale['A4'] == 440 # old specification
assert scale['A#4'] == 0 # now specified and set to 0
def test_tune_all_by_interval():
intervals = [1, 27/25, 25/21, 9/7, 7/5, 75/49, 5/3, 9/5, 49/25, 15/7, 7/3, 63/25, 25/9]
scale = Scale(reference_pitch='C4', reference_frequency=260,
pitches_per_octave=13, octave_interval=3)
scale.tune_all_by_interval(intervals)
assert scale[60+13] == 3 * scale[60]
assert scale[20+26+11] == scale[20] * 9 * intervals[11]
def test_pitchname():
scale = Scale()
assert Scale.pitchname_to_pitch('A4') == 69
assert Scale.pitchname_to_pitch('Ab-1') == 8
assert Scale.pitchname_to_pitch('A-1') == 9
assert Scale.pitchname_to_pitch('B8') == 119
assert Scale.pitch_to_pitchname(69) == 'A4'
assert Scale.pitch_to_pitchname(8) == 'Ab-1' or Scale.pitch_to_pitchname(8) == 'G#-1'
assert Scale.pitch_to_pitchname(9) == 'A-1'
assert Scale.pitch_to_pitchname(119) == 'B8'
def test_note_on_off():
audiogenerator = Audiogenerator(sc=None)
audiogenerator.note_on('A4', 0.7)
assert audiogenerator.keys[69].frequency == 440
audiogenerator.scale = Scale(reference_frequency=450)
assert audiogenerator.keys[69].frequency == 450
audiogenerator.scale[69] = 460
assert audiogenerator.keys[69].frequency == 460
audiogenerator.note_change_freq('A4', 470)
assert audiogenerator.keys[69].frequency == 470
audiogenerator.note_change_amp('A4', 0.5)
assert audiogenerator.keys[69].amplitude == 0.5 * audiogenerator.global_amplitude
audiogenerator.note_off('A4')
audiogenerator.note_on('A4', 0.8)
audiogenerator.attack_time = 0.1
audiogenerator.note_on('A4', 0.2)
assert audiogenerator.keys[69].attack_time == 0.1
audiogenerator.attack_time = 0.2
assert audiogenerator.keys[69].attack_time == 0.1
audiogenerator.note_on('A#4', 0.2)
assert audiogenerator.keys[70].attack_time == 0.2
audiogenerator.note_off('A4')
audiogenerator.stop_all()
assert not audiogenerator.keys[69].currently_running
assert not audiogenerator.keys[70].currently_running
def test_callback():
class Callback:
def __init__(self):
self.pitch = None
self.frequency = None
def call(self, pitch, frequency):
#print(pitch, frequency)
self.pitch = pitch
self.frequency = frequency
c = Callback()
scale = Scale()
scale.on_change = c.call
assert c.frequency == None
assert c.pitch == None
scale['A4'] = 440
assert c.frequency == 440
assert c.pitch == 69
def test_getter():
scale = Scale()
assert max(scale.specified_pitches) == 127
assert scale[127] == scale[128]
assert scale[69.5] == scale['A4']
assert scale[69.51] == scale['A#4']
assert len(scale[:]) == 128
assert len(scale[:123]) == 123
assert len(scale[123:]) == 128 - 123
assert len(scale[::2]) == 128 / 2
assert scale['A4', 'A5'] == [440, 880]
def test_setter():
scale = Scale()
scale['A4'] = 400
assert scale[69] == 400
assert scale[69.4] == 400 # not specified but near to a specified
scale[69.5] = 500
assert scale[69.5] == 500
assert scale[69.4] == 500 # not specified but near to a specified
scale[1:10:2] = [1,2,3,4,5]
assert scale[1:10:2] == [1,2,3,4,5]
scale['A4', 'C#2'] = [1,2]
assert scale['A4', 'C#2'] == [1,2]
def test_tune_all_by_interval_in_cents():
intervals_in_cents = Scale.tunings_in_cents['Werkmeister 4']
scale = Scale(reference_pitch='C4', reference_frequency=440/Scale.cents_to_freq_ratio(intervals_in_cents[9]))
scale.tune_all_by_interval_in_cents(intervals_in_cents)
assert scale['A4'] == 440
assert approx_equal(Scale.freq_ratio_to_cents(scale['E3'] / scale['C3']), intervals_in_cents[4])
def test_tuning():
scale = Scale()
scale.tune_pitch('A4', 441)
assert scale[69] == 441
scale['A#4'] = 442
assert scale[70] == 442
scale[69:73] = [500, 501, 502, 503]
assert scale[69:73] == [500, 501, 502, 503]
scale = Scale()
assert scale['E5'] / scale['A4'] != 3/2 # ET!
scale.tune_pitch_by_interval('E5', 3/2)
assert scale['E5'] / scale['A4'] == 3/2
scale = Scale()
scale.tune_pitchclass('C3', 100)
assert approx_equal(scale['C2'], 50)
assert approx_equal(scale['C3'], 100)
assert approx_equal(scale['C4'], 200)
scale.reference_frequency = 400
scale.tune_pitchclass_by_interval('C3', 1.1)
assert approx_equal(scale['C2'], 220)
assert approx_equal(scale['C3'], 440)
assert approx_equal(scale['C4'], 880)
scale = Scale()
# 10 tone equal temperament witch octave streched to 10 : 1
scale.reference_pitch = 33
scale.reference_frequency = 1
scale.pitches_per_octave = 10
scale.octave_interval = 10
scale.tune_all_equal_temperament()
assert approx_equal(10 * scale[33], scale[43])
assert approx_equal(scale[33]/scale[34], scale[98]/scale[99])
scale = Scale()
scale.tune_pitch_by_interval_in_cents(70, 123)
assert abs(np.log2(scale[70] / scale[69]) * 1200 - 123) < 1e-10
scale.tune_pitchclass_by_interval_in_cents(70, 345)
assert abs(np.log2(scale[70] / scale[69]) * 1200 - 345) < 1e-10
assert abs(np.log2(scale[70+12] / scale[69]) * 1200 - (345 + 1200)) < 1e-10