lv2rack is JACK based, GTK (2.x) host for LV2 synths. It has one JACK MIDI input port (routed to all hosted synths) and one (two for stereo synths) JACK audio output port per plugin. Such design provides multi-timbral sound by running several synth plugins. Ported to Pandora by Canseco.

http://repo.openpandora.org/?page=detail&app=lv2rack