Yeah. I ended up moving the project back to my iMac G5 (now that it’s had it’s second motherboard replacement). The exported 32 GB QT file was used and DVDSP had no problem. Everything is burning just fine now.
Ok. With help from the DVDSP group I found that I need to create a ac3 file, which I found by using Dolby settings. The file created and I imported it into DVDSP. I played the file and had complete silence.