pyabc2.Pitch

class pyabc2.Pitch(value)

A pitch with value relative to C0.

Parameters:

value (int) – Chromatic distance from C0 in semitones (half steps). For example, C4 (middle C) is 48, A4 is 57.

Examples

>>> from pyabc2 import Pitch
>>> Pitch(48)
Pitch(value=48, name='C4')
>>> Pitch(57)
Pitch(value=57, name='A4')

>>> Pitch.from_name('E#3')
Pitch(value=41, name='E#3')
>>> Pitch(41)
Pitch(value=41, name='F3')

>>> Pitch.from_etf(440)  # Hz
Pitch(value=57, name='A4')

__init__(value)

Parameters:

value (int)

Methods

__init__(value)
from_class_name(class_name, octave)	From pitch class name and octave.
from_class_value(value, octave)	From pitch class chromatic value and octave.
from_etf(f)	From frequency, rounding to the nearest piano key.
from_helmholtz(helmholtz_name)	From Helmholtz pitch notation.
from_name(name)	From scientific pitch notation (SPN).
from_pitch_class(pc, octave)	From pitch class instance.
to_note(*[, duration])	Convert to note (eighth note by default).
to_pitch_class()	Convert to pitch class, preserving the class name.
unicode()	String repr using unicode accidental symbols and unicode subscripts for octave.

Attributes

class_name	Note name (pitch class).
class_value	Chromatic note value of the corresponding pitch class, relative to C.
equal_temperament_frequency	Piano key frequency.
etf	Alias for equal_temperament_frequency.
helmholtz	Pitch name in Helmholtz pitch notation, e.g. C, and c' (ASCII).
n	Alias for piano_key_number.
name	Note (pitch) name with octave, e.g., C4, Bb2.
octave	Octave number (e.g., A4/A440 is in octave 4).
piano_key_number	For example, middle C (C4) is 40.
value	Pitch value (integer chromatic distance from C0 in semitones (half steps)).