I noticed yesterday that Enter Sandman uses FS2 as a multi. What the multi does is not only turn off and on effects, it also changes amps. And while it is turning on certain effects, it is turning off others and vice versa. E.G.,
FS2 multi off
Reverb on
Chorus on
Screamer dist off
Noise gate off
Studio EQ off
Treadplate amp off
Blackface amp on
FS2 multi on
Reverb off
Chorus off
Screamer dist on
Noise gate on
Studio EQ on
Treadplate amp on
Blackface amp off
That is a pretty powerful one button push. You have to have your computer HD editor software connected to figure these things out. Then you can start figuring out what the originator of the patch fully had in mind.
Here is the weird part. When you unselect FX2, the patch does not pass the guitar signal. It is silent. If you go to amps and increase the BYP vol on the unselected amp, treadplate, from its default 0 to 100, the volume increases. It is a clean sound rather than distorted.
Also the BYP Vol changes to the unselected amp. It is never on the selected amp. How can adjusting the BYP Vol on the unselected amp pass signal for the selected amp? Why does BYP amp jump to the unselected amp? What is BYP Vol? It looks like patch 6A Pull Me Under (Dream Theater) out of the same set list has the same type issue.