http://empeg.comms.net/php/showflat.php?Cat=&Board=install&Number=29400&page=&view=&sb=&o=&vc=1

Details how the switch works. You've got it right, it's either/or not both. Since the Ipaq doesn't have a separate 'sound on' line I've not tried attaching ipaq to it.

-Zeke
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