
Bristol Posse
Okey Dokey
You seem to be discribing background noise that is present and relative to the volume (at the mic) with your voice- This relative amount of noise won't change with how hot you track, or whether you turn it up before or later in Sonar. If that's the case you need to get away from the noise, get some isolation, or get closer/sing louder.
Not necessarily
Fast track pro is very entry level gear and the preamps are just about OK for consumer gear.
If you add a lot of gain those preamps can become noisier so it would be better to track lower and then turn up in the DAW rather than track loud, you'd most likely end up wit less system created noise that way and a cleaner vocal