there is a phase invert switch for each channel on the front panel so you should be able to set it however you want
oh, is that what those buttons are for?
I've been doing some 4-mic mixes with 744T recordings (sep guitar and bass tracks along with a stereo on-stage pair) and not always getting the results I expect when I add in the instrument channels, so I'm trying to figure out whether that might be a phase issue - therefore, it would be nice to know whether the 5012 outputs are inverting phase or not. Seems to me I read somewhere that transformer-based outputs typically do invert phase, but I might be thinking of tube output stages instead. I have a mail in to Neve but haven't gotten a response yet.
Steve