Trey and their album covenant is how I found out there was such a thing as 7 strings. I had recently started playing, and a six string could not cover the range I was after. At one point I was down to G#1 on a 6 but then I lost the high strings
. I saw Trey playing a 7 and looked into it. It was exactly what I was after.
![noplease :noplease: :noplease:](http://www.sevenstring.org/styles/default/xenforo/smilies/noplease.gif)