not so. There is 16 bit quantisation noise; if you record very low and then normalise by 20dB for example, the noise floor will also be raised by 20 dB to the point where it is noticeable. That is why maxing as much as possible in the 7k mixer is worthwhile when recording digitally, because the normalisation required will be far less, only a few dB, and any noise boost un-noticeable. In fact it's possible to clip with edited voices at 127 without normalisation. Noise on analogue recording will be far worse, unless you have an expensive soundcard with excellent screening.