REGISTER_CALLBACK (serv, "/toggle_all_rec_enables", "f", toggle_all_rec_enables);
REGISTER_CALLBACK (serv, "/all_tracks_rec_in", "f", all_tracks_rec_in);
REGISTER_CALLBACK (serv, "/all_tracks_rec_out", "f", all_tracks_rec_out);
REGISTER_CALLBACK (serv, "/toggle_all_rec_enables", "f", toggle_all_rec_enables);
REGISTER_CALLBACK (serv, "/all_tracks_rec_in", "f", all_tracks_rec_in);
REGISTER_CALLBACK (serv, "/all_tracks_rec_out", "f", all_tracks_rec_out);