Rock Revolution (EU)

This achievement is easiest to get if you use a standard controller, when you're in the studio open up the menu and go to "Track Select", choose a track and then "Select Sound", just play a note on each and the achievement will unlock at the end.

To be safe it's best to play a few notes on each and to clarify you need to try out each sound in these sections; Drums, Rock Guitars, Other Guitars, Solo Guitars, Bass.

Just go into the Studio and select Jam session.
Now just select each of the different sounds for the guitar and have a quick strum on each sound.
Once you have gone through all the sounds quit out and plug your drums in and again go through the different sounds available and have a quick bash on each.
Once you have played on the last sound the achievement should be yours.