#76 gx_amp_stereo lists "worker#schedule" as Required, but works even without

[Giulio Moro]

Therefore, http://lv2plug.in/ns/ext/worker#schedule should probably be declared Optional

[brummer]

Nope, it's true that the plugin didn't crash and produce sound effect, but the cabinet and presence didn't work. So it is indeed requiert to support the worker extension. Host's which didn't support that, shouldn't load those plugins.