Missing RIFF chunk

[leonard]

OK, I did that. It plays to my computer just like anything else. ASSET, JRiver and MINIMServer all play to my computer just fine. foobar2000 and MS Server plays to the N50 via the "cast" function or using the control app on the smartphone. I can do it with a playlist, a single file or folder and a group. The Control app displays all of the servers mentioned. I can select the MS Server server and the foobar2000 server and they play the music. I access the other three and I get "Invalid File Format". Are Ms and foobar changing the files? Am I missing something?