so far i am doing ok with one string tremolo

but when i try to do it on two , i get a horrible noise and i miss one of the strings alot

any tips? or technique i should know?

thanks in advance
"It's peace at last, or peace at least"
it takes a lot of practice but what i usually do is tune my guitar down to drop c or b so i can do bar chords.
you wanna try and slightly palm mute the chords. but id recommend looking up some cradle of filth, childern of bodom or other serious death metal tabs if you wanna get the hang of it.
CoB counts as melodeath, last time I checked. But Cradle of Filth is extreme metal and blackened symphonic metal alternately.