Pruning the forum database.
DeadBeef and UMPlayer suddenly started playing ok.These show up on the Playback tab as you said.DeadBeef still freezes with one .wav file that I have found so far, but Ican open terminal and kill it. It doesn't freeze the system.I will have to investigate further about WINE.I am at present happy to modify this series of messages to Partially Solved.I would like to thank everyone for the advice and extreme patience shown.I admit that I have found the whole thing very interesting.
Yes, youtube, DeadBeef, UMPlayer work OK at the moment,but there are still no system sounds.
Only gdm will play sound by login, but there something buggy.