PartCombineMusic - LilyPond program-reference
Description: LilyPond program-reference

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#### PartCombineMusic

Combine two parts on a staff, either merged or as separate voices.

Music types: general-music and part-combine-music

Accepted by: Swallow_engraver and Swallow_performer

Properties:

`name` (symbol):
  `'PartCombineMusic`

  Name of this music object

`length-callback` (procedure):
  `ly:music-sequence::maximum-length-callback`

  How to compute the duration of this music. This property can only be defined as initializer in `define-music-types.scm`.

`start-callback` (procedure):
  `ly:music-sequence::minimum-start-callback`

  Function to compute the negative length of starting grace notes. This property can only be defined as initializer in `define-music-types.scm`.

`types` (list):
  `'(general-music part-combine-music)`

  The types of this music object; determines by what engraver this music expression is processed.

`iterator-ctor` (procedure):
  `ly:part-combine-iterator::constructor`

  Function to construct music-event-iterator object for this Music

This page is for LilyPond-2.8.8 (stable-branch).

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