Would downloading music for free be illegal if you buy vinyl records?

I don’t own any vinyl records; I’m just wondering. You own the songs, but it seems odd that you can’t import the songs on vinyls as mp3s so I don’t buy them. I’ll only wait until I see a very legendary album on a vinyl record for a low price when I buy one, although I probably will already have the CD version.

Also, would it still be supporting the artist if somebody buys a vinyl record or cassette and they download the mp3 for free?

It is not illegal , You are allowed to have a digital copy of any music you have a hard copy of. The Supreme Court has decided this. They do not say how you obtain this copy.So download it.