Re: [AH] "calibrating" my audio mixer?

From Brian Willoughby
Sent Fri, Jan 4th 2019, 05:26

On Dec 28, 2018, at 10:47 AM, Boniforti Flavio <xxxxxxxxx.x@xxxxx.xxx> =
wrote:
> I would like to have never to touch the instrument volumes - just set =
the input gains on the mixer to "maximize" s/n ratio when recording and =
adjust the output levels for my jams...
> Also, for the few pages I've read, I am better working with "0 dB =
mixing" (afaiu, have all mixer faders at 0 dB and only reduce levels, =
never boost them).

I wouldn=E2=80=99t say never. Plenty of analog mixers do perfectly well =
with the faders above 0 dB.

Every circuit is different, and each has its limits. Most work just fine =
for 90% of the volume range and then get noisy at the very extreme. This =
is more of an issue with the Trim levels than the channel faders. The =
Trim is going to be affected by what you plug in, with some things =
producing more noise at certain settings than others. The channel fader =
should be less sensitive to what you plug in, since it=E2=80=99s being =
driving by the output of the Trim circuit.

The most important thing is that if you do manage to get your instrument =
volumes set to the ideal output levels for the best sound, and your =
mixer Trim levels set so that distortion is impossible, then you=E2=80=99l=
l still have a lot of variation from one synth preset to the next (as =
others have already mentioned). For the quieter patches, you=E2=80=99ll =
certainly need to boost above 0 dB on the Channel Fader, but that =
shouldn=E2=80=99t add any noise if you have the Trim set correctly to =
match the output level of your synth. In other words, don=E2=80=99t be =
afraid to boost above 0 dB on a channel to make all of the instruments =
mix well.


> But I have to admit: I might be off-the-path, as I'm really new to =
this terrain (I never took volume levels/mixing too serious during my =
jams).
> F.

I recommend that you just get used to your gear, making notes as you go =
along. If you find distortion in a given recording, then track down =
which channel and why. Next time you record, you hopefully will have =
learned.

Brian Willoughby