The idea of a hard drive music device was thought up around that time IIRC. As early hard drives for small computers didn't really exist in 1979 and it was either tapes, or something akin to RAMAC? at IBM, not to mention they were beastly expensive just per MEGABYTE, maybe you would have had one Elvis song.
I found the voice well rounded and of FM like processed quality (like an Orban).