I watched "shattering the skies above" the other day (by trivium) and I noticed that matt has some paper between the strings on the headstock. what does this do? I'm guessing it mutes the strings or something for solo's.

Search: Shattering the skies above trivium- on youtube.com
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Yeah it mutes the strings. Helps with keeping the solos clean (not having strings vibrate from the vibration of other strings).
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Probably for muting the string .. yeah
to get rid of unwanted sound in a string switching solo
It's most likely used for muting strings. I was reading that some guitarists that use a jazzmaster/jaguar do the same thing behind the bridge to cut down on vibrations.
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