16-Aug-2014, 09:15
I did a couple of test today. First I found that in the settings of audacity you can change the meter to go down to -147. Then you can expand the meters to get clearer readings. I was getting a -73db reading as average value.
I did try to select other sources (digital) and the reading was completely silent. I tried to un plug the analog cables and still the reading was -73dB. I tried to record and the db curve was flat but in the spectrogram you could see the noise.
I tried to record some music and I noticed that to be completely sure no clipping would occur I had to lower slightly the input volume, that took the base noise closer to -80dB.
So it seems that the phono input is generating some noise, what is not clear is why the devialet meters show lower values.
M
I did try to select other sources (digital) and the reading was completely silent. I tried to un plug the analog cables and still the reading was -73dB. I tried to record and the db curve was flat but in the spectrogram you could see the noise.
I tried to record some music and I noticed that to be completely sure no clipping would occur I had to lower slightly the input volume, that took the base noise closer to -80dB.
So it seems that the phono input is generating some noise, what is not clear is why the devialet meters show lower values.
M