#1
when i pick a note on the higher strings and use the tremolo, the lower strings vibrate, ruining the note. is that normal or does the tremolo need to be set up?
#2
Pics of the trem?

TBH though, you really should learn to mute other strings with both, or at least one, of your hands [ie palm for picking hand, fingers/tips for fretting hand].
Sunn O))):
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Guitar:
- Ibanez S670FM w/ JB
- Fender 'Lite Ash' Stratocaster
- Fender '72 Deluxe Telecaster
- Arbiter LP Jr. Doublecut
Amp:
- Laney VC15

'72 Tele Appreciation Group
RIP DIO
#3
That's normal since your tremolo is for all the strings so just mute the lower string with your palm when using your tremolo.
#4
ok thanks, i just needed to know that thats normal.
i´ll start practicing muting