I'm recording vocals and acoustic instruments with my shure57 microphone and behringer ultragain pro preamp and I've been trying to reach the best signal to noise ratio. From what I know to achieve this I should turn input gain on my preamp all the way up until it my signal during louders parts is just below the clipping point.
Ok, I get it.
But what if I recorded with, let's say 20dB less gain and then added this gain to already recorded material in my DAW? Would it be more noisy?
Like in these two situations:
Input gain on preamp +40
desired signal hovers around -10dbfs in my DAW
noise signal hovers around -50dbfs in my DAW
So signal is 40dB louder than noise
Input gain on preamp +20
desired signal hovers around -30dbfs in my DAW
noise signal hovers around -70dbfs in my DAW
Signal is still 40db louder than noise, now I can apply 20 dB in my daw and it's the same as the previous recording.
Is this thinking right/wrong? If it's wrong please tell me why. Thanks for reading.