newfs

I have read the manual and combed Google and now I am asking this forum for a solution. I have a Mandolin Teacher who is a piper and he has a lot of recordings in the old style NON HD recording on of course a NON HD machine by Sony. Is there software out there that can be bought as it appears Sony will not develop anything that I can load his 74 discs recorded in Non HD format that would allow it downloaded to a PC either thru my MZ RH910 or another device?? This is insane that this cannot be done. My Mandolin teacher and I will be eternally grateful. Ron