Re: Auto Gain
Hi Mick,
sorry for having kept you waiting, but school is keeping me busy.
1: Does "saving the scene" just refer to the Autogain function? Or is it necessary for Automixer as well?
“Have you saved your scene?” question will pop up on pressing “Start”- or “Continues”-button to ensure you not to override gain- and fader-settings in the X32-mixer. Only if you answer this question with: “yes” the program will proceed. You can disable the safety question in the setting menu.
For example:
You make a soundcheck with your first musicians using “Start” function and you get your perfect sound. Then you want to do the soundcheck with a second band. Without the safety question you might forget to save the scene (gains, faders etc) for the first band in the X32-mixer and override it with the values of the second band.
Automixer can be used together with Autogain-function in one scene:
a band playing in the background, controlled by Start/Continue and
orators controlled by Automixer.
2: Is there any interaction between channels in your design? I ask because you say you have to use a bus and specify that bus in the program. I'd be interested to know how it works, if you are willing to divulge the info. And of course you are perfectly entitled not to.
Yes, there is an interaction between the channels selected for the Automixer. This interaction will reduce unwanted noise signals by reducing the number of open mics.
The Dugan Automixer is mostly used as an Insert-Effect. It uses a separate gain for each mic-channel outside of the mixer to reduce the level of the mic-channels.
I have tried to adopt Dan Dugan’s Automixer algorithm as described in here:
http://www.protechaudio.com/products/PDFFiles/DuganMixing.pdf…
L[SUB]n[/SUB]’=L[SUB]n[/SUB] - [Sum(L[SUB]n[/SUB]) – L[SUB]n[/SUB]]
L[SUB]n [/SUB] is the level in channel n before attenuation
L[SUB]n[/SUB]‘ is the level in channel n after attenuation
Sum(L[SUB]n[/SUB]) is the sum of the levels in all channels (the sum is taken before individual channels are attenuated)
…
I don’t have a second gain to attenuate microphone levels as Dugan has, so I use “bus sends” to simulate the missing second gain.
By changing a channel fader assigned to Automixer you can variate the ratio to other Automixer-channels. Fader-Channel n will change
(L[SUB]n[/SUB]), i.e. make one person louder or quieter. With the bus-fader the loudness:
Sum(L[SUB]n[/SUB]’) is changed.
If you have further questions, feel free to contact me. I will
try to answer them.
Friedrich Altheide