![]() ![]() In case of tie, there are defined class sort orders defined in To have Elements that appear before non-priority set elements. Tempo change with the higher priority number would apply to theįollowing notes (by being processed second).ĭefault priority is 0 thus negative priorities are encouraged Mean, for instance, if you had two elements at the same offset,Īn allegro tempo change and an andante tempo change, then the KeySigElement.priority = 1 clefElement.priority = 2 this might beĪ slightly counterintuitive numbering of priority, but it does The same time but the key change to appear first, then set: Instance, if you want a key change and a clef change to happen at To right (highest number) of objects at the same offset. Priority specifies the order of processing from left (lowest number) Which is safer or streamObj.elementOffset(self) which is 3x faster.Ĭhanged in v8: using a Duration object as an offset is not allowed. If we put a Note into a Stream, we will see the activeSite changes. Way of calling o.getOffsetBySite(o.activeSite, returnType=’rational’). That is, the most recently referenced Stream or Stream subclass suchĪs Part, Measure, or Voice. Offsets are measured from the start of the object’s activeSite, (generally in quarterLengths), depending on what is representable. The offset property sets or returns the position of this object id of a Voice should be unique in any single Measure,īut the id’s may reset from measure to measure across a Part. ![]() “Unique” is intended with respect to the stream hierarchy one is likely id ¶Ī unique identification string or int not to be confused with Python’sīuilt-in id() method. Since these two objects are therefore not interchangable, they do not have Their offset, activeSite, id, and groups do not matter for equality. Two Music21Objects are equal if they are the same class and same duration. Some of these may be intercepted by the subclassing object (e.g., durationįor historical reasons, music21 uses a different idea of object equalityįor Music21Objects than recommended by modern Python standards. ![]() hasStyleInformation firstĮach of these may be passed in as a named keyword to any music21 object. ![]() Style: a Style object, that contains Style informationĪutomatically created if it doesn’t exist, so check. Priority: int representing the position of an object among allĭerivation: a Derivation object, or None, that shows Specifying the position of the object in a site. Offset: a floating point or Fraction value, generally in quarter lengths, (voices, parts, selections) to which this element belongsĭuration: Duration object representing the length of the objectĪctiveSite: a reference to the currently active Stream or None List of strings identifying internal sub-collections Id: identification string unique to the object’s container (optional). DurationsĪnd Pitches (which need to be attached to Notes, etc.) are not.Īll music21 objects have these pieces of information: Notes, Clefs, TimeSignatures are all sublcasses of Music21Object. Music21Object is the base class for all elements that can go into Streams. Music21Object ( id : str | int | None = None, groups : Groups | None = None, sites : Sites | None = None, duration : Duration | None = None, activeSite : stream.Stream | None = None, style : Style | None = None, editorial : Editorial | None = None, offset : OffsetQL = 0.0, quarterLength : OffsetQLIn | None = None, ** keywords ) ¶ Music21Object Music21Object ¶ class music21.base. ![]()
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