I think the reference to "album" derives from when several 78 rpm records, which were not LP (Long Playing) and could not contain a full recording on two sides, were placed in an actual album, a book of sleeves each containing one disc. It looked similar to a photo album. The use of the descriptive word just carried over to LP's and, now, to any recording.
I have now proved I am more than eligible for geezer status.