Hi there Maeve
I'll check but as I removed your plugin I could see the shortcode on the live visual website page in the main body of the text - although I did not look under the html tab - so I think that it must have still been there - but I will have another look to make sure.
Under view are you able to see my source code if you go to the website? I had a look yesterday and I could loads of code for your audio player - so I thought it was there but just not visible on the page.
Also is VLC media OK to convert the mp3 file to an ogg. file?
Do you know of any known conflicts with any other plugins or themes when used with the audio player plugin?
Thanks again for coming back to me - I know that my questions must seem rather basic to you - so thank you for your patience and help.