"Gain staging" and noise/dynamic range confusion accounts I would guess for getting on for 20% of all forum questions? The bare facts are. A modern interface with a decent capacitor microphone will have a noise floor BETTER than most peoples houses most of the time. The sound level of course matters. Speech at a conversational level should give no problems even with a dynamic mic such as the 57/58s. A 7b might be pushing things with 'mid range' interfaces. Even moderately lusty singing will be fine with any microphone. Put that another way? It is very unlikely that hardware is causing a noise problem although of course, anything can be faulty. Recording at 24 bits means even the very best audio gear is limited by its ANALOGUE noise.Thank you very much! As I understood, 32 bit float allows me to record at very low gain level and then boost it without boosting noise. Maybe, I understood something wrong.