These are voice filters for modules: FMS voice comment, assignment voice comment and other modules which use Flash Media Server.
You need to upload these filters to filters folder and turn them on on moodle admin page.

If you want to use NanoGong , add line

$CFG->userecordtype = ‘nanogong’;

into config.php file which is placed in Moodle root

Download:
fms voice
fms voice comment
Voice Comment Nanogong