The guitar sound.

Apple set the guitar sound with the guitar program that allows you to tune the guitar.
  Functions and operation simple, easy and fast.
The application was created specifically. For acoustic guitars.
The guitar follows
 The first line will have a volume E.
 The second line will have a volume B.
 The third line has to be pitch G.
 Line 4 will have a volume D.
 Line 5 will be the volume A.
 Line 6 will have a volume E.