to get into a DA88 you’ll need either tdif which is a digital format or for +4 balanced audio a properly wired 25pin dsub. on board option is -10 unbalanced rca jacks which really isn’t an option at all. You may be better off getting single tracks out to a data disk and having an audio house taking care of it. There are converters that will convert from AES to tdif, and or analog but that might be too much of an investment for 1 job to a legacy format.