I dunno what the legal situation is in the UK, but here in the US, when we buy a copy of a recording, we are permitted to make one legal copy of it for our own use.

When we buy blank media, part of the money paid goes to musicians and composers. Somehow.

Personally, I think the spirits of the ancient songs were hovering over your Landfall LP, and the stereo inhaled them and sent them to your computer.