Microsoft and Steinberg: LRCLfe Lrs Rrs Lss Rss Ltf Rtf Ltr Rtr
SMPTE/ITU, Dolby (industry norm, logical order of the speakers in pairs from front to back) : LRCLfe Lss Rss Lrs Rrs Ltf Rtf Ltr Rtr
Note: Please leave the actual labeling semantics to another debate. It’s obvious what speakers I’m referring to. It’s the order we are talking about.
Also the old SMPTE Film format (L C R …) is pretty much abandoned and thats not the current SMPTE/ITU moving forward. Protools is also stuck in the past, albeit different from MS standard so there can be no argument of the winning standard here. It is definitely SMPTE/ITU.