Thanks very much for the help. Unfortunately my blog is based on audio clips and that Audio Player, which I’ve just tried, isn’t reliable. When I try to edit its settings, the changes won’t save, and when I try editing my posts to use it, the changes won’t save. I realise that Audio Player isn’t your responsibility (!) but I mention this as it might flag up a problem on my blog for an expert like yourself.
I can’t abandon the player I’m using until I have a viable alternative, even if it means new readers can’t subscribe.