#1
How do I get feedback from the guitar/amp? I want to be able to control it for example the solo in "let her cry" by Hootie & the blowfish in the third solo when he plays the first half of the solo while the guy is singing he gets some feedback and then repeats the lick.
#2
turn up the volume, and get close to your amp. Hit a string, and it should ring into feedback.
#4
you've gotta have your amp volume quite high, and have a nice dosage of gain too.
plus, the type of feedback you'll get, it varies depending on where the guitar is facing, comparing to the amp.