Full list of all 8 Kinect Fun Labs: Air Band achievements worth 50 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox 360.
Reached maximum activity level on any instrument
Played each of the five songs in one play session
Shared a performance containing all three instruments
Two players performed each combination of instruments in one song
Played both left and right handed guitars in one song
Shared a video on KinectShare.com
Shared a photo on KinectShare.com
Played each of the three instruments in one song