Although it claims to support a handful of alternate tunings, most scales are unavailible for anything but standard tuning. I bought this to have a reference for scales in DADGAD and Open D, but for almost every scale I select while using these tunings I get the message: "No playable scales". This program would be awesome if they fixed this and gave us the option of creating our own custom tunings. As it is right now, its a good program if you only play in standard tuning.