Hi John.
Thanks for your message. I'm not sure I'm making the problem clear. It's not the sound that is the concern but the exact synching between 35mm and XD footage. The VFX work will need to make sure that these two cameras will be at the exact same frame, and the 35mm camera will definitely be shot at 24fps. The problem we also have is that jamming a PAL timecode into the EX3 gives a 25fps timecode which won't sync up with the 35mm cameras, and ideally, the VFX team want to work at NTSC anyway. So, the EX3 could be shot at 1080/24p (NTSC), and the 35mm cameras at 24fps, but then the PAL timecode will be off, and we have a mix between PAL/NTSC... Is that at all clear? I feel like I'm confusing myself!