im just wondering how i can slove this problem
when i play 2 notes on seperate strings one after another the second one is more faint then the first.
just wondering what i can do to solve this
rock and/or roll!
that could be a number of things, perhaps the pickups aren't adjusted to optimal heights, if the strings aren't given enough space to resonate in front of the pickups it can really harm the sound and tone.... maybe the strings need replacing, the list could go on.

What kind of guitar is it?
it's most likely what boon said about the pickups or strings, but it can also be the neck. Try adjusting the pups and new strings, if not take it to a techy.
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My Rig

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You can't tune a LP copies down. Some kind of lawsuit Gibson won. Sorry.
try to adjust the pole pieces or the pickup height.
Ibanez RG321MH (Air Classic/Tone Zone)
Fernandes Telecaster (Twang King/stock bridge pickup)
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