I know all my scales, modes, theory, ect. but im having trouble playing what i want to play, any tips
Bit of a vague question... can you expand on what you're having trouble with?
i have an idea what sound i want but i cant seem to replicate it
Don't try to replicate a sound. Like don't force yourself to play music like your favorite bands you will never replicate they're style just like them. Come up with your own sound a new sound.
im trying to replicate the sounds in my head not from another band
Ohh that is kind of hard. You need to know how to play by ear, like you need to know what sound each pitch is and etc.