### 3.1.128 TrillPitchHead

TrillPitchHead objects are created by: Pitched_trill_engraver.

Standard settings:

> `duration-log` (integer):

>   `2`

>   The 2-log of the note head duration, i.e., `0` = whole note, `1` = half note, etc.

> `font-size` (number):

>   `-4`

>   The font size, compared to the ‘normal’ size. `0` is style-sheet’s normal size, `-1` is smaller, `+1` is bigger. Each step of 1 is approximately 12% larger; 6 steps are exactly a factor 2 larger. Fractional values are allowed.

> `stencil` (stencil):

>   `ly:note-head::print`

>   The symbol to print.

> `Y-extent` (pair of numbers):

>   `#<unpure-pure-container #<primitive-procedure ly:grob::stencil-height> >`

>   Extent (size) in the Y direction, measured in staff-space units, relative to object’s reference point.

> `Y-offset` (number):

>   `#<unpure-pure-container #<primitive-procedure ly:staff-symbol-referencer::callback> >`

>   The vertical amount that this object is moved relative to its Y-parent.

This object supports the following interface(s): font-interface, grob-interface, item-interface, ledgered-interface, pitched-trill-interface, rhythmic-head-interface and staff-symbol-referencer-interface.

#### Internals Reference v2.18.2 (稳定分支).