Quartz Composer for Leopard  OSX10.5:

Quartz Composer for Tiger OSX10.4:

Current version ( Dec 2009 ) QC IBVA4 plugin is not work with Snow Leopard.

Stile work IBVA4 QC Graph menu function with Snow Leopard.

This case no need to use QC IBVA4 plugin to make brain and sound wave drive QC animation.