A new effect, for the voice...
http://www.clearvoicespray.com/index2.php
Seriously, there is some good info to read at this link, specially under the Pedal Power section
http://www.musicianshotline.com/archive/
If you have good eyes, you can read the schematics... :lol:
That's what bring me there
http://www.musicianshotline.com/archive/monthly/pedal_power/0304.htm