If LV2 plugins are anything like VSTs, you'll need to load the plugin in your audio application and route your MIDI input through that plugin. In most DAWs this

If LV2 plugins are anything like VSTs, you'll need to load the plugin in your audio application and route your MIDI input through that plugin. In most DAWs this is done by creating a track then assigning MIDI input and the VSTi to the track.