About two months ago I started playing with the Nanogong Module for Moodle.  Nanogong is a part of the Gong Project and is a Java based audio recorder that integrates with Moodle. It worked OK in 1.8 but when I upgraded to 1.9 everything went south.  Over the last few weeks the developers, the "Hong Kong University of Science and Technology", have done a lot of work on the module and just recently made the module Open Source.  I upgraded to version 3.1 last night and things seem to be working quite well now.