As someone who does mixing…I don’t want your stems. I want your tracks…sans any plug ins…I want the WAV files, timestamped–WITH any editing DONE. If I edit, it’s to remove a noise or other sonic reason…Otherwise, if there are ten vocal lead tracks in those 70, I want ONE of them–the one you’re comfortable with as “the” lead vocal as an artist.
I don’t produce. Remotely…it’s a losing battle. Content=not me. Every time I bend my own rule I end up doing revisions where ALL I’m doing is “hey, can you edit out this chord?”…“hey, can you fade X before I play that thing I no longer like?” Fail. Not my job. Here’s the rule, you send me what you’ve got, and I will do my damnest to keep as much of the content IN as I can. No promises.
Anyway, If you sent me a drum stem, I would refuse it. If you knew how to mix drums as well as I do, you wouldn’t be sending them to me to mix. I question someone who wants to mix your stems. I mean…is it inexpensive? Like really inexpensive?
So the process should be do a “save as” so you don’t mess up your working mix…reset the mixer…bypass all plug ins…and do two batch exports–one of the mono sources with “mono downmix” selected…and one of the stereo sources. Alternatively, you could set up mono buss, assign all mono track to it, and batch export in one pass (if the track is assigned to mono buss, Cubase will export it as mono. I personally think this is a bug. If I select a mono track/channel to export, I dont give a crap what it’s sent to in the mix, I want a mono file…but, that’s a grumble…I’m sure they do it because people insert mono to stereo plug ins and want to render…
Anyway, that’s how you get the tracks out for mix. I don’t want a stem except in very specific cases…you’ve done all kinds of virtual instrument orchestral stuff–I’d prefer a stereo mix of it–that may be 30 different channels. I don’t want to conduct your virtual orchestra. Or I’ve had people do sort of keyboard stacks that they use a bunch of different VIs but it ultimately is one stack playing a part…just give me the mix of the components in one…but, as a rule, I don’t welcome stems.