Got it! '93 DC mix PCM Well, that was easy... Thanks, DM!
I don't want the combined maximum bitrate to spike and go over 10080 or some players might not play the disc. (The maximum bitrate of any MPEG-2 stream I encode always appears to read as higher than the value I input, when I view it in DVD Lab Pro's bitrate viewer). Perhaps I will convert the PCM to AC-3. I'll ask Belbecus for permission to use this too.