I just finish my last branch to make smooth path interactivity way with pencil tool in Inkscape. Here are the video:
You also can select other paths than last to smooth. not in video.
Here are the code https://code.launchpad.net/~inkscape.dev/inkscape/simplify-lpe-pencil-toolbar
Artist: Dale Herr (ASCAP) 100%.
Song: Aa Bottom-WCPM.