Yes it is a universal chromatic tuner so it works for all instruments such as the mandolin
No, for example a Guitar Hero 2 guitar will work for Guitar Hero 3. However for the guitar to work it must be for the same system. A xbox 360 guitar will only work on a 360.
The Guitar Hero guitar will work with Rock Band but the Rock Band guitar won't work with Guitar Hero. -Nate
Guitar is not an orchestral instrument since it is not a regular part of a symphony orchestra. There are only several pieces that require guitar (and/or mandolin), but those are only for one or several movements inside a piece and not for the entire duration of the work. There are several reasons for exclusion of the guitar from the symphony orchestra, but the main one would probably be the difference in volume levels between the guitar and other orchestral instruments.
The Guitar Hero guitar will work RockBand for the Wii, but may not work for Beatles: Rock Band.
No but in Guitar Hero 5 it will work
Yes they will work
Guitar Hero controllers work with all Guitar Hero games, which is great! WOO!
yes
Yes and Yes.
yes
yes it does