So I'm reading the manual for my Allen & Heath MixWiz 16:2 and I come across this passage describing the use of the effects channel. I'm going over it again and again and just can't picture what they're talking about. Anybody willing to help? The picture I have in my head is: channels 1-16 --> effects circuit (using ST5 for level & mute) --> main faders The MixWizard WZ316:2 and WZ312:2 feature a built-in stereo digital effects processor. This can be configured to work as a single 16 preset effects engine fed from AUX5 Huh what? I thought aux channels were outputs. How can they provide input to the effects circuit (or anything else in the board)? I would have thought the effects processor was "fed from" (i.e. receiving input from) channels 1-16. What does "fed from" mean in this context? The processed signal is routed back to the mix through the ST1 (ST5) stereo return channel. I don't see anything marked ST1 on my mixer. OK fine, the manual covers a couple of different models. It looks like my ST5 channel consists only of a level control and mute button. So I guess "routing back to the mix through ST5" means that ST5 level is a master between channels 1-6 and the main faders controlling the amount of effects on all channels. Is that right? If anybody knows a reasonably short online primer of effects mixing concepts and terminology, that would be great. I could post fewer "help me" threads. On the other hand, somebody else probably has the same question so maybe the thread helps the greater good. In any case, thanks very much for all help and advice.