But, then, there's that pick noise that BB King or other "dimed" LP blues etc. players get, just a fraction of a second before the note sounds out. It sounds like they're muting a string, then plucking the muted string and the fretted string at the same time. Like in Shine On You Crazy Diamond; the very first note, or some of the others in that intro solo. It adds a really nice dimension to the note; kind of kicking it out there... very blues.