def generate_interval(self) -> (Interval, Pitch, Pitch):
# Generate first random pitch
pitch_generator = PitchGenerator(scale=self._scale,
lowest_pitch=self._lowest_pitch,
highest_pitch=self._highest_pitch,
possible_detune=0)
pitch1 = pitch_generator.generate_pitch()
# Generate second random pitch
possible_pitches = list()
for pitch in self._scale.get_pitches(from_pitch=self._lowest_pitch,
to_pitch=self._highest_pitch):
interval = Interval.from_pitches(
from_pitch=Pitch.lower(pitch1, pitch),
to_pitch=Pitch.higher(pitch1, pitch))
if self._largest_interval.get_cents()\
>= interval.get_cents()\
>= self._smallest_interval.get_cents():
possible_pitches.append(pitch)
pitch2 = random.choice(possible_pitches)
# Return interval and pitches
output_pitch1 = Pitch.from_pitch(pitch=Pitch.lower(pitch1, pitch2),
detune=random.uniform(
-self._possible_detune / 2,
self._possible_detune / 2))
output_pitch2 = Pitch.from_pitch(pitch=Pitch.higher(pitch1, pitch2),
detune=random.uniform(
-self._possible_detune / 2,
self._possible_detune / 2))
output_interval = Interval.from_pitches(from_pitch=output_pitch1,
to_pitch=output_pitch2)
return output_interval, output_pitch1, output_pitch2
def generate_interval(self) -> (Interval, Pitch, Pitch):
# Generate first random pitch
pitch1 = Pitch.from_frequency(
random.uniform(self._lowest_pitch.get_frequency(),
self._highest_pitch.get_frequency()))
# Generate second random pitch
output_interval = random.choice(self._scale.get_intervals())
pitch2 = pitch1.add_interval(output_interval)
if pitch2 == Pitch.higher(self._highest_pitch, pitch2):
pitch2 = pitch1.copy(detune=-output_interval.get_cents())
if pitch2 == Pitch.lower(self._lowest_pitch, pitch2):
raise RuntimeError(
'[MicrotonalIntervalGenerator:generate_interval()] ' +
'Could not generate interval! ' +
'Make sure that lowest_pitch is sufficiently lower than highest_pitch!'
)
# Return interval and pitches
output_pitch1 = Pitch.from_pitch(pitch=Pitch.lower(pitch1, pitch2),
detune=random.uniform(
-self._possible_detune / 2,
self._possible_detune / 2))
output_pitch2 = Pitch.from_pitch(pitch=Pitch.higher(pitch1, pitch2),
detune=random.uniform(
-self._possible_detune / 2,
self._possible_detune / 2))
return output_interval, output_pitch1, output_pitch2