Guitar Hero World Tour’s new instrument is not actually an instrument at all but rather a feature that will allow PC users to import MIDI tracks into the Xbox 360 and Playstation 3 versions.
The MIDI sequencer functionality will incorporate the rhythm guitar, lead guitar, bass, keyboards, and drum tracks on the Playstation 3, but will be limited to drum tracks on Xbox 360 due to “hardware issues.”
The feature will arrive as a week-one patch for the game when it releases October 26th.