munotes 0.1.0

Handle musical note and chord in Python

munotes

musical-notes

This library is for handling notes and chords in Python.

Note

Note class. Handling note.

Note class is used by entering the note name and octave height at initialization.

from munotes import Note
note = Note("A", octave=4)
print(note) # A4

Note class defines these attributes.

print(note.name)   # A
print(note.idx)    # 9
print(note.octave) # 4
print(note.num)    # 69
print(note.freq)   # 440.0

• Note.name: str Note name
• Note.idx: int Index of note name with C as 0
• Note.octave: int Octave
• Note.num: int MIDI Note Number
• Note.freq: float Freqency

It is possible not to define octaves at initialization, in which case all attributes except for name and idx will be None.

This class can be transposed with Note.transpose().

note.transpose(5)
print(note)        # D5
print(note.name)   # D
print(note.idx)    # 2
print(note.octave) # 5
print(note.num)    # 74
print(note.freq)   # 587.3295358348151

If an integer between 0 and 127 is entered at initialization, it is used as the midi note number, and other attributes are initialized based on it.

note = Note(40)
print(note) # E2

Chord

Chord class. Handling chord.

This class is used by entering the chord name at initialization.

from munotes import Chord
chord = Chord("A#m7")
print(chord) # A#m7

Chord class defines these attributes.

print(chord.name)       # A#m7
print(chord.root)       # A#
print(chord.type)       # m7
print(chord.interval)   # (0, 3, 7, 10)
print(chord.notes)      # [Note A#, Note C#, Note F, Note G#]
print(chord.note_names) # ['A#', 'C#', 'F', 'G#']
print(chord.idx)        # [10, 1, 5, 8]

• Chord.name: str Chord name
• Chord.root: munotes.Note Root of a chord
• Chord.type: str Chord Type
• Chord.interval: Tuple[int] Height of the sound when the root as 0.
• Chord.notes: List[munotes.Note] List of notes that make up the chord.
• Chord.note_names: List[str] List of munotes.Note.name
• Chord.idx: List[int] List of munotes.Note.idx

Like Note, This class can be transposed with Chord.transpose().

chord.transpose(3)
print(chord)            # C#m7
print(chord.note_names) # ['C#', 'E', 'G#', 'B']