If you just want to 'sound better', try getting some really high quality karaoke tracks... Real players on everything! Really GOOD players on everything! That's the best you'll ever sound... Of course, you have NO CONTROL at all, but what the hey! It's the logical end result of this line of technology, anyway.

I was just trying to point out that 'sounding better' at the cost of losing flexibility and chord choices is a poor decision, at least for me. Others may not CARE they can't play any chord they want to. This may be JUST what they need...