If you are like me and having a hard time with the manual here is the way to do it
plug your source Ipod, computer..etc into the input jacks
click on CONFIG and EDIT next to it until you get to INPUT 1/2
INPUT THRU parameter needs to be set to "0".
BOOST stays on Off
I left SENSITIVITY on +5 dBV
Then get to the second page INPUT 2/2 by clicking on PARAMETERS
select you source as ANALOG and characteristic LINEAR
click on EXIT
click on PARAMETERS until you get to ROM U
click on VALUE until you get to ROM U 97
you can start applying effects to the source