I did some additional tests now with my Rode
NTG3 directly into the UM46k
XLR1 phantom powered. Regardless of the settings, I can get a very clear sound.
I have measured the basic room loudness (2 PC and 2 external RAID fan noise) with SPL meter:
C weighting/slow response gives ~ 42dB at the same position I placed the NTG3 later.
I did 3 recordings into my NTG3 ~ 10 cm from my mouth.
You can download the audio files from
hereFiles with the suffix _MASTER are with post gain applied, the others are directly out of the camera footage.
Screenshots from the spectrum analyzer at 1 sec of room tone only (no voice).
a) mic low / gain 50 / post gain +30dB
b) mic low / gain 100 / post gain +24dB
c) mic high / gain 50 / post gain +3dB
Conclusions:1. Noise floor seems to be pretty similar regardless of the settings after gain normalizing in post.
2. It looks like setting c) gives the lowest noise floor over a) and b).
3. In-camera gain 100 equals +6dB over gain 50.