Each string of a viola is wrapped around a peg near the scroll and is tuned by turning the peg. Tightening the string raises the pitch; loosening the string lowers the pitch. The A string is normally tuned first, to the pitch of the ensemble: generally 400-442hz. The other strings are then tuned to it in intervals of fifths, usually by bowing two strings simultaneously. Most violas also have "adjusters"—"fine tuners", particularly on the A string that make finer changes. These adjust the tension of the string via rotating a small knob above the tailpiece. Such tuning is generally easier to learn than using the pegs, and adjusters are usually recommended for younger players and put on smaller violas, though pegs and adjusters are usually used together. Some violists reverse the stringing of the C and G pegs, so that the thicker C string does not turn so severe an angle over the nut, although this is uncommon.