This library is meant to provide plugin and host authors with a bunch of easy-to-use audio-related GTK+ widgets (knobs, graphs, LEDs, curve editor, musical keyboard widget). The widgets have been separated out of Calf audio plugin pack. Python API is provided as well.

Plans for more distant future include creating a toolkit-independent version, which could be reused in different toolkits - including GTK+, Qt and FLTK. The work on that part is made in 'canvaslike' branch. In that branch, the widget implementation is modified to only use Cairo library for drawing, and to use an abstraction layer for toolkit events. Future versions will hopefully contain the XML-based layout engine and styling/bitmap support, and interfaces for using with Qt and FLTK.