@ND3JR These were decidedly not DAT /DCC, nor were they anything Hi Bias. And even with HI Bias they still tend to be muddy with a more pronounced high end. (At least that's my experience). I haven't had experience with Dolby S or dbx, but those tended to be formats that needed special playback in otder to work

Also 48kHz is best for recording but isn't any better for playback.

Cool that you used DAT at your radio stations. We were still using reel-to-reel for our promos et al.