LV2 is a standard for plugins and matching host applications, mainly targeted at audio processing and generation. LV2 is a simple but extensible successor of LADSPA, intended to address the limitations of LADSPA which many applications have outgrown. This revision changes the data portion of the specification only (i.e. lv2.h is unchanged). *** IMPORTANT *** This revision makes a simple but important clarification, relevant to both host and plugin and authors: A serialisation (i.e. save files, patch files, preset files, network protocols, anything not associated with a specific plugin binary) which refers to an LV2 port MUST do so using the port symbol and NOT the port index. Of course, at runtime the index may still be used, as in LADSPA. This is not a binary change. See lv2.ttl for details and rationale, but in short this allows much more elbow room for plugin authors to improve their plugins over time without changing the URI, and opens the door for fully dynamic ports on plugins without backwards compatibility issues, among other things. Some developers have complained about the strict URI/versioning rules, these issues are resolved in this revision without weakening compatibility guarantees. Plugin authors: no more worrying about port indices! Further discussion is best done on the LV2 development list, see <http://lv2plug.in> for more information. Upgrading and ensuring correctness is STRONGLY encouraged for host authors, so plugin authors can apply this new freedom in practice. Specification download: <http://lv2plug.in/spec/lv2core-3.0.tar.bz2> Enjoy, - The LV2 Team