Hi, this may seem a silly question. Both what is an 'acceptable" noisefloor? Basically, I'm thinking about recording the final tracks for my CD - the vocals and acoustic guitar parts - at home on some very good gear. I treated the room with high-density fibre-glass panels, including a few that are 4 ply for the low frequency stuff. All the micing is strictly close up using the direction feature on a u87. The room is reasonably quiet but not perfectly sealed. There are some low-level low frequency hums from outside - traffic and a transformer. The mix sounds reasonably quiet and the noise doesn't appear on an meters. But I'm somewhat concerned about the build up of the noise over 4 tracks (2 vocal and 2 guitar) and that even if it isn't audible, that somehow it would affect the tone of the whole thing, or make it sound muddy? Will it make the overall recording marginally better to record in a real studio or much better for the average listener - the buying public? It's not really about being cheap, its just I feel more comfortable taking my time and recording my parts at home. Penny for your thoughts.