Gigajam Xtractor/Analyser allows you to load up a MIDI file or Gigajam Performance file - it then allows you to play along and fade the individual elements in and out accordingly. You can adjust the tempo to suit your skill level and you may also record your own guitar tracks alongside then save your performance for later use.
When you work your way through a lesson you will be asked to perform a series of play-along exercises - both with a video and a MIDI music file. If you have a MIDI-enabled instrument you can record your own performance into Xtractor and then hit the A button to perform an analysis. Analyzer displays your performance underneath the exercise in standard notation, but with notes colored according to how accurately you played them - along with a percentage assessment score. Version 184.108.40.206 includes unspecified updates.