Yo Atomic One:
So, you want to do vocals with the MD8 -- no problem; I have used that unit for vocals many times.
Can't understand why Pier is getting a "high pitched squeal" unless she uses open head phones and a sensitive mic -- that will cause feedback or Pier has her home speakers/monitors on when recording.
What you need with the MD8 is a mic pre -- that is a great asset for signal strength.
Let's say you take a CD music background and put it in the MD8.
That leaves you lots of tracks for vocal work or just one track if that's all you need.
If you do your own music, get that done first and make sure you have enough headroom for the vocal; don't let the music cover you up.
Put some reverb into the headset -- it will give you this feeling of power when you sing. The verb won't be recorded -- you can do that when you mix down, like several different types of reverb and delay -- this can run into many hours of putzing around but that's how you get a GOOD cut.
I ran a test yesterday; I did a vocal on my Yorkville mic and did it over on my AKG 3000. The AKG was superior in depth, dimension, and sound quality. Well, there goes the Yorkville in the corner. The Yorkville looks like many mics out there that seem to have the same body and probably made in China. Right now I'm scouting the AKG 4000 because I've heard nothing but good stuff about that mic.
Pan the vocal straight up @ 12:00. You can re-pan later if you want to when you mix; but I like to keep the vocal up front.
Well Uranium 234, I hope this helps you out. Have fun.
Green Hornet