Atomic Tech - Lead guitar/backing track

I purchased a new interface for my computer and this is the very first, fully structured guitar track I've made using it. It's the Focusrite Scarlett 2i2 interface. I've never mixed and mastered a track recorded from an interface before, so I'm not sure how well the quality is...but from you guys reviews it'll help in the future.

The C# over both the C and D chords was really effective. Good job on that.
The low C in the chord for some reason I find a bit sharp. I don't know if I'm right.
The backing track can add more voices. Right now there's a rift between the track and the lead due to "voice stratification" where the bass and treble don't really have any mid-range voices to balance them and it sounds a bit empty as a result.