Viola - wolf on the F, G string in The Pegbox Posted 6 hours ago · Report reply I know a cellist who has a great sounding modern cello. On the front there is something that looks like a button, but not to turn it on , but t turn a wolf off. I have experimented on various violas with small pieces of roofing lead, which I stuck to different places of the instrument (or the chinrest, tailpiece, or fingerboard) with double-sided tape to find the place where a little weight would remove or reduce a wolf note. On the viola that I play I kept a little piece of lead under the fingerboard and it is almost gone. This also removes a peculiar wolf on the open A string which is only there when I don't have my hand on the neck. I also found that violas with a big C string sound tend to have a wolf between e and f on the g-string.