It played all but one DVDA for me. It very well could be the disc. I had zero issues with any retail discs/formats. I have a fairly large collection and I don't listen to surround very often, so it might take me a few years to put together a formal compatibility list. I spent a month's worth of surround time last night piling through as many disc types and formats that I could so I knew what I still needed the Oppo for. I could probably live without the Oppo if I'm being honest, but since I have it mind as well just keep it.If the Sony refuses to play all burned DVD-As that's a non started for me, I have hundreds of DVD-As from Oxford Dickie's matrix decodes and Captain Beyond's Q4 and Q8 transfers.