aGuitar Pro is a computer software designed to improve musical skills of the bass/guitar player, as well as providing keys/scales/chords references, tablature tools, and bass/drums midi tracks for practicing.
  It includes:
<ul><LI> 'Ear Training' exercises, which are extremely useful for any musician.</LI><LI> Tab viewer/player and a Tab Manager.</LI><LI> Midi band: A set of tools for recording and playing bass/drums tracks, great for soloing.</LI><LI> Chords/Keys/Scale Generators.</LI><LI> Easily add customs scales/chords.</LI><LI> Supports custom tunings.</LI><LI> Plus more....</LI></ul>

Features
-Easily browse scales and chords, and listen to them pressing the "play" button.
-Learn the chords that can be played on a given key. And listen to these chords by just clicking on them.
-Use the chord generator to view the different ways that a chord can be played along the fretboard.
-Learn the number of steps in an interval by using the "Intervals list".
-Expand aGuitar Pro adding your custom scales/chords to the list