Although Im not good at sweep picking my self, but I know how you are supposed to do it. The guitarist that showed me was
Joe Stump, ya him, the 6th fastest guitar shreder of all time, just 3 behind
Yngwie Malmsteen. Stump is just about the fastest guitarist ive ever heard. Who else can play 16th notes at like 350 CLEAN, and like actual riffs going up the neck. Just wow.
OK. For riffs like the one posted above out of Tender serender where u have 2 or 3 notes u have to hit and they are all on the same fret, you do bar, but you do not use any right hand muting. You have to "roll" ur finger from the first string int that fret to the last. If it is like 3 strings u have to do this to, you hit the first (if ur going from high e down) right about where ur finger bends (below ur finger nail). The top of ur finger should be pointed up so its not on the other strings. Then you "roll" ur finger down hitting each note, then you do the same thing to go up, u just reverse it. Hard, ya, but its the easiest and cleanest way to do it. And yes, in the end its the best way, just take it from the best guitarists out there.