I have some 88.2/24 FLAC audio files on a DVD-R which I converted using Max to AIFF, but I want to hear them at 88.2K rate thru my new DACport headphone amp which is compatible with that and with 96K. I can play 96K DVD-Rs, but get no sound when clicking on either the 88.2 or 192 files. And my iMac DVD Player says the files are not supported. What must I do to hear these files?