Author: Nikolay Lysenko
"""
import itertools
import math
import random
from dataclasses import dataclass
from typing import Any, Optional
from sinethesizer.utils.music_theory import get_note_to_position_mapping
from .music_theory import (N_SEMITONES_PER_OCTAVE, TONE_ROW_LEN,
get_smallest_intervals_between_pitch_classes,
invert_tone_row, revert_tone_row, validate_tone_row)
NOTE_TO_POSITION_MAPPING = get_note_to_position_mapping()
SMALLEST_INTERVALS_MAPPING = get_smallest_intervals_between_pitch_classes()
SUPPORTED_DURATIONS = [0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0]
DURATION_SPLITS = {
6.0: [[4.0, 2.0], [3.0, 3.0]],
4.0: [[2.0, 2.0], [3.0, 1.0]],
3.0: [[2.0, 1.0], [1.5, 1.5]],
2.0: [[1.0, 1.0], [1.5, 0.5]],
1.5: [[1.0, 0.5], [0.75, 0.75]],
1.0: [[0.5, 0.5], [0.75, 0.25]],
0.75: [[0.5, 0.25]],
0.5: [[0.25, 0.25]],
0.25: [[0.25]],
}
"""
Help to work with notions from music theory.
Author: Nikolay Lysenko
"""
from typing import List, NamedTuple
from sinethesizer.utils.music_theory import get_note_to_position_mapping
NOTE_TO_POSITION = get_note_to_position_mapping()
TONIC_TRIAD_DEGREES = (1, 3, 5)
class ScaleElement(NamedTuple):
"""A pitch from a diatonic scale."""
note: str
position_in_semitones: int
position_in_degrees: int
degree: int
is_from_tonic_triad: bool
class Scale:
"""A diatonic scale."""
def __init__(self, tonic: str, scale_type: str):
"""
Initialize an instance.
:param tonic: