Hi trevarthan, thanks for taking the trouble to reply. I have spent more time on this now and it seems that ogg vorbis files may not be supported? I have a few mp3’s and they work exactly as you describe. Once the (mp3) tracks are being played then, with interaction with the sound, the icons start to make sense and I can figure most of them out. Is there a fix for my ogg issues? I have installed ogg-support and, as I have said, these files play perfectly in UKMP.