AL-9000 is a noise synth, good for special FX/Sci-Fi stuff. The random sequences generated with PAL-9000 could have a very long evolving time, so my suggestion is to press a key and let it sing. PAL-9000 should react to pitch bend, modulation wheel, and channel aftertouch, but I'm not sure anymore.
Download PAL-9000 From MaxSynths Website
(opens external url)