scamp.score.Voice

class scamp.score.Voice(contents: Sequence[Tuplet | NoteLike], time_signature: TimeSignature)

Bases: ScoreComponent, ScoreContainer

Representation of a single voice within a single measure of a single staff of music.

Parameters:

• contents – list of Tuplet or NoteLike objects in this voice

• time_signature – the time signature of the measure to which this voice belongs

Variables:

time_signature – the time signature of the measure to which this voice belongs

Methods

empty_voice(time_signature)	Constructs an empty voice containing simply a bar rest.
from_performance_voice(notes, ...)	Constructs a Voice object from a list of PerformanceNotes
iterate_notes([include_rests])	Iterate through the notes (and possibly rests) within this Voice
non_empty_length()	Length of the part of this voice that has something in it.
to_music_xml([source_id_dict])	Convert this score component to its corresponding pymusicxml component

Inherited Methods

append(item)	Add a child ScoreComponent of the appropriate type
export_lilypond(file_path[, non_score_blocks])	Convert and wrap as a LilyPond (.ly) file, and save to the given path.
export_music_xml(file_path[, pretty_print])	Convert and wrap as a MusicXML score, and save to the given path.
export_pdf(file_path[, non_score_blocks])	Exports score as a PDF file and saves it to the given file_path
extend(items)	Add several child ScoreComponents of the appropriate type
index(item)	Get the index of the given child ScoreComponent
insert(index, item)	Insert a child ScoreComponent at the given index.
pop([i])	Pop and return the child ScoreComponent at the given index.
print_lilypond([wrap_as_file, non_score_blocks])	Convert and print LilyPond code, via the abjad library.
print_music_xml([pretty_print])	Convert and wrap as a MusicXML score, and print the resulting XML.
remove(item)	Remove the given child ScoreComponent.
show([non_score_blocks])	Using the abjad.show command, generates and opens a PDF of the music represented by this component
show_xml()	Convert and wrap as a MusicXML score, and open it up in notation software.
to_abjad([wrap_as_file, non_score_blocks])	Convert this score component to its corresponding abjad component
to_lilypond([wrap_as_file, non_score_blocks])	Convert to LilyPond code, via the abjad library.

Attributes

contents

list of Tuplet or NoteLike objects in this voice

property contents: Sequence[Tuplet | NoteLike]

list of Tuplet or NoteLike objects in this voice

iterate_notes(include_rests: bool = False) → Iterator[NoteLike]

Iterate through the notes (and possibly rests) within this Voice

Parameters:

include_rests – Whether or not to include rests

non_empty_length() → float

Length of the part of this voice that has something in it. (i.e. the length not counting trailing rests that aren’t part of a tuplet)

classmethod empty_voice(time_signature: TimeSignature) → Voice

Constructs an empty voice containing simply a bar rest.

Parameters:

time_signature – the time signature of the measure to which this voice belongs

classmethod from_performance_voice(notes: Sequence[PerformanceNote], measure_quantization: QuantizedMeasure) → Voice

Constructs a Voice object from a list of PerformanceNotes

(This is where a lot of the magic of converting performed notes to written symbols occurs.)

Parameters:

• notes – the list of PerformanceNotes played in this measure

• measure_quantization – the quantization used for this measure for this voice

to_music_xml(source_id_dict=None) → Sequence[BeamedGroup | pymusicxml.score_components._XMLNote]

Convert this score component to its corresponding pymusicxml component

append(item: ScoreComponent) → None

Add a child ScoreComponent of the appropriate type

export_lilypond(file_path: str, non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → None

Convert and wrap as a LilyPond (.ly) file, and save to the given path.

Parameters:

• file_path – file path to save to

• non_score_blocks – a list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad); typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

export_music_xml(file_path: str, pretty_print: bool = True) → None

Convert and wrap as a MusicXML score, and save to the given path.

Parameters:

• file_path – file path to save to

• pretty_print – whether or not to take the extra space and format the file with indentations, etc.

export_pdf(file_path: str, non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → None

Exports score as a PDF file and saves it to the given file_path

Parameters:

• file_path – where to save the PDF

• non_score_blocks – a list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad); typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

extend(items) → None

Add several child ScoreComponents of the appropriate type

index(item) → int

Get the index of the given child ScoreComponent

insert(index, item) → None

Insert a child ScoreComponent at the given index.

pop(i=-1) → ScoreComponent

Pop and return the child ScoreComponent at the given index.

print_lilypond(wrap_as_file: bool = False, non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → None

Convert and print LilyPond code, via the abjad library.

Parameters:

• wrap_as_file – if True, wraps this as an abjad.LilypondFile

• non_score_blocks – (Only applicable if wrap_as_file is set to True). A list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad). Typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

print_music_xml(pretty_print: bool = True) → None

Convert and wrap as a MusicXML score, and print the resulting XML.

Parameters:

pretty_print – whether or not to take the extra space and format the file with indentations, etc.

remove(item) → None

Remove the given child ScoreComponent.

show(non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → None

Using the abjad.show command, generates and opens a PDF of the music represented by this component

Parameters:

• non_score_blocks – a list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad); typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

show_xml() → None

Convert and wrap as a MusicXML score, and open it up in notation software. (The software to use is defined in engraving_settings.show_music_xml_command_line.)

to_abjad(wrap_as_file: bool = False, non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → Component

Convert this score component to its corresponding abjad component

Parameters:

• wrap_as_file – if True, wraps this as an abjad.LilypondFile

• non_score_blocks – (Only applicable if wrap_as_file is set to True). A list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad). Typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

to_lilypond(wrap_as_file: bool = False, non_score_blocks: Optional[Sequence] = None, **lilypond_file_args) → str

Convert to LilyPond code, via the abjad library.

Parameters:

• wrap_as_file – if True, wraps this as an abjad.LilypondFile

• non_score_blocks – (Only applicable if wrap_as_file is set to True). A list of abjad.Block objects (or strings containing the LilyPond code for such a block, which are then parsed by abjad). Typical blocks might be a header block, a layout block, or a paper block. If no header block is specified, one will be created with the score’s title and composer. If a header is specified, title and composer will be added if not present.

• lilypond_file_args – any additional keyword arguments will be passed along to the constructor of abjad.LilyPondFile (assuming wrap_as_file is True). This allows for setting staff size and various other customizations.

Returns:

a string containing the LilyPond code