Hi! I tried to play audio with code like in the example in the Be Book http://pagesperso-orange.fr/cvincent/bebook/The%20Media%20Kit/MediaAddOn.html but I came across a problem: there are only AudioAdapter, Flanger, Auich ICH, Audio Mixer (Haiku), Demo Audio Producer, Demo Video Producer and VideoWindow Consumer dormant nodes. That's the result I get from #include <Application.h> #include <MediaRoster.h> #include <MediaAddOn.h> #include <iostream> int main() { BApplication app("application/x-vnd.k"); dormant_node_info nodes[30]; int32 count = 30; if (B_OK == BMediaRoster::Roster()-> GetDormantNodes(nodes, &count)) { for (int32 i = 0; i < count; ++i) std::cerr << nodes[i].name << std::endl; } return 0; } and there's no mention of the B_FILE_INTERFACE addons, although I have such files as /boot/system/add-ons/media-plugins/wav_reader. Why is it this way? Regards, Adrian.