I few months ago i requested this help and got a solution but as your codes keep changing and my theme coding keeps changing the solution no longer works. This code worked well for a while but it no longer works.
global $rtmedia;
$rtmedia->allowed_types[ 'music' ][ 'label' ] = 'Podcast';
$rtmedia->allowed_types[ 'music' ][ 'plural_label' ] = 'Podcasts';
Is there a way to easily change the “music” navigational title label to “podcast”
http://linepitch.com/members/LinePitch/media/music/