- Nov 6, 2006
Any mixer with an Aux out can make a mix minus. Some DJ mixers already have "record outs" that are a mix minus so DJs can record their music set without any of the mics making it into the recording. The DJ gig isn't really my concern because in that scenario it would be fine to grab the audio out only and have the person hold a mic while also talking on the phone. It would appear more personal and familiar as a shared conversation. .You can run a mix/minus on the aux out of an MG10. I think you can do it on the Mackie ProFX series too but I haven't actually tried it
Corporate is different - the meetings may be hours long and whose on the line may change or they may be silent for long periods of time. The boards I would use this on are digital rather than analog; Yamaha CL5, QL5, QL1; Midas M32 & M32R, Behringer X32, etc. Events where I would want to do this would typically need a minimum of 6 mix busses - at least 4 of which can be routed to an Aux output. So the smallest mixer that I can use would be a QSC Touchmix 8 or Midas/Behringer MR/XR16 with a single active phone line.
Each active line requires it's own mix minus bus, so what our resident IT guru doesn't grasp is that in a software environment (conference system) you can have as many virtual busses as you want (generally all done without you even be aware) In a live sound setting however, you have the physical constraints of the console you are using and the configuration parameters of all the other physical devices being connected.
If the phone lines are already VoIP then there's no reason not to use a conference system but, that's not at option at all locations, or it's a pay option that the client gets ripped off for. I want to have alternatives that won't add to their cost and don't require any IT. It's even better when the issue comes up at the last possible moment and I can go to it immediately. (It's how I maintain my reputation as a miracle worker APM factor: Anticipation = Perceived Miracle.