Note Class

The muspy.Note class is a container for musical notes.

Attributes	Description	Type	Default
time	Start time	int
duration	Note duration, in time steps	int
pitch	Note pitch as a MIDI note number	int (0-127)
velocity	Note velocity	int (0-127)

Hint

muspy.Note has a property end with setter and getter implemented, which can be handy sometimes.

class muspy.Note(time, pitch, duration, velocity=None, pitch_str=None)

A container for notes.

time

Start time of the note, in time steps.

Type

int

pitch

Note pitch, as a MIDI note number. Valid values are 0 to 127.

Type

int

duration

Duration of the note, in time steps.

Type

int

velocity

Note velocity. Valid values are 0 to 127.

Type

int, default: muspy.DEFAULT_VELOCITY (64)

pitch_str

Note pitch as a string, useful for distinguishing, e.g., C# and Db.

Type

str, optional

property start

Start time of the note.

property end

End time of the note.

adjust_time(func, attr=None, recursive=True)

Adjust the timing of the note.

Parameters

• func (callable) – The function used to compute the new timing from the old timing, i.e., new_time = func(old_time).

• attr (str, optional) – Attribute to adjust. Defaults to adjust all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

transpose(semitone)

Transpose the note by a number of semitones.

Parameters

semitone (int) – Number of semitones to transpose the note. A positive value raises the pitch, while a negative value lowers the pitch.

Returns

Return type

Object itself.

clip(lower=0, upper=127)

Clip the velocity of the note.

Parameters

• lower (int, default: 0) – Lower bound.

• upper (int, default: 127) – Upper bound.

Returns

Return type

Object itself.

copy()

Return a shallow copy of the object.

This is equivalent to copy.copy(self)().

Returns

Return type

Shallow copy of the object.

deepcopy()

Return a deep copy of the object.

This is equivalent to copy.deepcopy(self)()

Returns

Return type

Deep copy of the object.

fix_type(attr=None, recursive=True)

Fix the types of attributes.

Parameters

• attr (str, optional) – Attribute to adjust. Defaults to adjust all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

classmethod from_dict(dict_, strict=False, cast=False)

Return an instance constructed from a dictionary.

Instantiate an object whose attributes and the corresponding values are given as a dictionary.

Parameters

• dict (dict or mapping) – A dictionary that stores the attributes and their values as key-value pairs, e.g., {“attr1”: value1, “attr2”: value2}.

• strict (bool, default: False) – Whether to raise errors for invalid input types.

• cast (bool, default: False) – Whether to cast types.

Returns

Return type

Constructed object.

is_valid(attr=None, recursive=True)

Return True if an attribute has a valid type and value.

This will recursively apply to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Whether the attribute has a valid type and value.

Return type

bool

See also

muspy.Base.validate()

Raise an error if an attribute has an invalid type or value.

muspy.Base.is_valid_type()

Return True if an attribute is of a valid type.

is_valid_type(attr=None, recursive=True)

Return True if an attribute is of a valid type.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Whether the attribute is of a valid type.

Return type

bool

See also

muspy.Base.validate_type()

Raise an error if a certain attribute is of an invalid type.

muspy.Base.is_valid()

Return True if an attribute has a valid type and value.

pretty_str(skip_missing=True)

Return the attributes as a string in a YAML-like format.

Parameters

skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

Returns

Stored data as a string in a YAML-like format.

Return type

str

See also

muspy.Base.print()

Print the attributes in a YAML-like format.

print(skip_missing=True)

Print the attributes in a YAML-like format.

Parameters

skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

See also

muspy.Base.pretty_str()

Return the the attributes as a string in a YAML-like format.

to_ordered_dict(skip_missing=True, deepcopy=True)

Return the object as an OrderedDict.

Return an ordered dictionary that stores the attributes and their values as key-value pairs.

Parameters

• skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

• deepcopy (bool, default: True) – Whether to make deep copies of the attributes.

Returns

A dictionary that stores the attributes and their values as key-value pairs, e.g., {“attr1”: value1, “attr2”: value2}.

Return type

OrderedDict

validate(attr=None, recursive=True)

Raise an error if an attribute has an invalid type or value.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

See also

muspy.Base.is_valid()

Return True if an attribute has a valid type and value.

muspy.Base.validate_type()

Raise an error if an attribute is of an invalid type.

validate_type(attr=None, recursive=True)

Raise an error if an attribute is of an invalid type.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

See also

muspy.Base.is_valid_type()

Return True if an attribute is of a valid type.

muspy.Base.validate()

Raise an error if an attribute has an invalid type or value.