I am trying to make a swishing sound by pulsing a pin and feeding it thru an RC into an amplifier. I want it to be kind of like a hiss with a gentle rise and fall. Not unlike a car approaching and then leaving but as a hiss not a roar. Anyone have any solution to keep me from reinventing the wheel? I think it would be a great effect for a swinging pendulum in a haunted house. Thanks in advance. Larry Sorry for the repost but forgot the subject category in the last post. Larry G. Nelson Sr. mailto:L.Nelson@ieee.org http://www.ultranet.com/~nr -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu