Is there such a thing as an app that has several of the top amp manufacturer's tones given side by side? Maybe it was just somebody's wishful thinking, but I thought I read about one somewhere (other than YouTube videos) that gives a little demo of the different amp colors. For instance what does something sound like with the 'Orange' voicing compared to a 'GK' baked in tone, etc. I know each manufacturer has too many different configurations (tube vs SS & hybrid) to give a comprehensive listing of all of them, but it sounds like a great idea for someone who may be wanting to make a purchase without being physically able to try them all. Does something similar already exist?