Calculating how to attenuate inputs for multiple channels

Harry LeBlanc

OK, I'm starting to plan a project, that will be an Infiltrator-style stepped gate for multiple effects. I can't know in advance how many effects the user will choose. I want to mix together multiple channels so that the combined signal is the same as the original dry signal.

How do I calculate what the levels should be, based on how many channels I'm mixing? I can see in the docs that the Mixer module has a logarithmic level control. How do I calculate that for 2 channels, vs 3 channels vs 7 channels, so the output volume is always at the desired level?

Thanks!

Uwe303

Hello,

you can´t really calculate it, for correlated sounds you get + 6 dB for any doubling of samples/channels afaik, uncorrelated is + 3 dB for any doubling. But in reality it is mostly in between, so around +4.5 dB. I would say there is no correct mathematical way to calculate that beforehand without adding/mixing all channels together. But hopefully someone else can help you out here at least with a rough method.