LV2 (LADSPA version 2) is an open standard for Audio plug-ins and matching host applications. It includes support for generation and processing of audio and MIDI. It is intended to provide an open alternative to competing standards such as VST and Audio Units.Currently there is support for LV2 in Ardour, Calf Studio Gear, Qtractor, Traverso DAW, Harrison Mixbus, and the 2.0.6 and above versions of Audacity.