Peter, that's sorted out quite a lot of them, still got quite a few left that just seem to be made up of normal characters, from the playlist:

#EXTINF:1590,BBC World Service - Being Bisexual
20170801_The Documentary.m4a
#EXTINF:1380,BBC World Service - Mother of deceased 'IS' fighter - Nicola Benyahia
20170802_HARDtalk.m4a
#EXTINF:1590,BBC World Service - Hadraawi The Somali Shakespeare
20170802_The Documentary.m4a