Yea, I can tell the guitar wasnt miced. re record the guitar with mic's it will make a HUGE difference, Put the drums on multiple tracks in cubase and eq/compress each drum as needed separatly, and pan them like a real drum it would be.
This would make a HUGE difference
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EQ Each Drum individually, just set your tom on to repeat one hit over and over again, and do small adjustments until it sounds like a real drum, for toms and kick, drop some of the high end out of it (though you may not need to since theyre sampled drums) and the kick def drop some of your lower frequencey, its way too boomy, try to find a better snare sample if you can, eq-ing snap into a snare is difficult, and even more difficult to explain. Persnally, drumkit frfom hell is IMO the best electronic sampled drum kit I've heard.
flatten out the bass eq and do small adjustments, add some compression to it, if it goes up and down in dynamics more than the music allows, put a limiter and an expander on it, that will flatten out all of the dynamics of the bass guiitar completley. then roll off some of the limiting/expanding untill you get the dynamic sound you like, but best way to fix the bass is to re-record it, if you have that kind of prob w/ dynamics then the executions was not good enough (I can't tell because I couildnt hear it on my headphones here at work) set the tone knob on the bass all the way up, the bass knob just past the middle volume all the way up, if you have a mid/blend knob, set that to the middle, flatten the eq on the board and just use the m-audio as the preamp, skip the berhinger, add effects after. The bass will come out more this way and sound cleaner. (those are the bass setting I use to get a good wide ranging sound, ie Mudvayne)
do this then listen to the vocals, they may sound better.
Hope this helps