Almost forgot. If you want to know about Major and Minor Keys. As in, 'This tune's in G major and that one's in G minor', you need to do the following. Play the scale from C up to the next C. That's C major. Now play the same scale but starting on A. It sounds a bit weird but this is the scale of A minor. It's actually a scale using exactly the same notes but starting on the 6th note of the major (normal doh, re, mi, scale). So, major scale starts on note 1 and minor is the same notes starting on note 6.