Many thanks for your reply yosemitebill. I now understand but I hadn't realised that the mp3 files became uncompressed in the CDA format (this is the first time I've attempted this sort of thing). Thank you once again.

Jane, I purchased a cable at Best Buy to connect my iPod to my stereo receiver. It sounds like you need the same thing. Go to the department that sells iPods and other MP3s and look for a rack of cable accessories. I think that mine is made by Belden. Or ask a salesperson for help. This cable will have a mini-plug on one end (plugs into the earphone jack on your MP3 player), and then splits into to two cables, each with an "RCA" plug on the ends. These match the inputs on your Sony system, make sure that you have two Audio In jacks, a Right and a Left. If you don't, you may need another type of cable, or an adaptor to go with the cable. It would be helpful if you could see your Sony unit in the same store that sells the cables, but not necessary. Radio Shack is probably another source for such cables. They tell you to turn down the volume on the player so that you won't blow out the speakers when you turn it on. Once you get it set up and working, you can see how to best set the volume. Hope this helps, Steve

Is it a Windows PC or a Mac? What program are you using? There is are two different formats - a Data CD is different from an Audio CD. Not physically (a blank is a blank) but relative to the protocols used in when the CD is recorded, so that when it's later put into a player or drive, the hardware knows which it is. Unless you're using a program that assumes audio, like iTunes, you usually need to specify which format to use. Some car CD players will only play CDs made using "audio format", others will use either. Is this problem happening with a fresh, previously unused CD blank?

Yes streaming apps is not their focus. On the 203 they included a 4k HDMI input so you can stream your Roku/Apple TV, Firestick etc through the player and not lose an HDMI input on your TV. The used to have the 103 and 105 priced similarly when they came out with these blu-ray players. If you assume a 2017 version of a similar feature upgrade from the 203 to the 205, then they are probably something like this: https://www.oppodigital.com/KnowledgeBase.aspx?KBID=37&ProdID=BDP-93 In the 103 /105 case, the higher end version was based mostly on improving the audio listening experience.