# Re: [NTG-context] filter module: call function before calling the filter command?

```On Wed, 12 Oct 2016, Henning Hraban Ramm wrote:

```
Now, I’d like to overwrite "texsettings.ly", containing the setting of ConTeXt’s text width, each time before I call LilyPond, to adapt its note line width to the current text width. That would automate the line width adaption to e.g. columns.

```
In the module’s documentation under "Dealing with expansion" I found the
example of creating the filter command in a macro.
Can I use this to call a Lua function first and then LilyPond? Or is there a
better way?
```
```
```
There is an internal option: filtersetups that may be useful for what you have in mind.
```
```
You can create a lua function, say lilypond.initialize(...), that does all the initializations, and then write
```
\startsetups lilypond:initialize
\ctxlua{lilypond.initialize()}
\stopsetups

\defineexternalfilter[...]
[ ...
filtersetups=lilypond:initialize,
...
]

This is untested, but it should work.

```___________________________________________________________________________________