You may be looking for the traditional music audio web resource rareTunes.org that was developed by the author of this Miscellany in partnership with the late Derek Hoy. The rareTunes system is not functioning at present due to technical issues although it is hoped that these will be resolved in due course. Please contact me if you require to discuss any aspect of the project, including specific musical items held in the archive.
Material in the rareTunes archive remains accessible online via Internet Archive and selected items are embedded in relevant parts of the Miscellany. Concertina related tracks have already been added to the relevant page and accordion and fiddle recordings will follow.