I'm not sure that the DMA scanners are set up this way, but I *think* this was the same issue that happened with the older 796 and 785 - there is a small delay in the record out jack, probably to allow for tape units that don't come up to full speed immediately (that's not an issue today, of course).
If that's true, and that is a big IF, there's really not much you can do about it with any software. It's the scanner...Mike