there is a site that I check on every now and then to see on different types of scales, with different tunings, it even gives you the guitar neck, the fret and tells you the note on whatever fret it's on and is free. It even has different features such as you can click on whatever tuning you're in, go over to the neck and click each fret and string that you are playing (like a chord) and it will tell you what that chord is. There are different scales and tunings and knowing whatever key you're in, trying some of these scales, you'll begin to realize by a little time and a lot of patience that you can change these different scales from one to the other and put together an excellent set of progressions in a song that sounds great. Check it out it is free...........Wildfire