khodowany
34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
"""Sounding-register references and hard solo instrument domains."""
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from __future__ import annotations
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import dataclasses
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import functools
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import fractions
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import generator.fretboard
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import generator.vocabulary
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@dataclasses.dataclass(frozen=True)
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class Instrument:
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part: str = ''
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strings: tuple[int, ...] = (1, 2, 3, 4, 5, 6)
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reference: int | None = None
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melody_range: tuple[int, int] | None = None
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@property
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def register(self):
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tuning = [p for s, p in generator.fretboard.STANDARD_TUNING if s in self.strings]
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return min(tuning) + 1, max(tuning) + 12
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@functools.lru_cache(maxsize=4096)
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def permits(self, number):
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return any(p.string_number in self.strings for p in generator.fretboard.single_positions_for_pitch(fractions.Fraction(number)))
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UNRESTRICTED = Instrument()
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def for_part(part, analysis=None):
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if part not in ('acoustic', 'electric'):
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raise ValueError('unknown solo instrument: ' + part)
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strings = (1, 2, 3, 4, 5, 6)
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if analysis is None or not analysis.melody:
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return Instrument(part, strings)
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return Instrument(part, strings)
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