Once I got the three Kings
from Napster (Albert, Freddie and BB), I lost interest in most of the other stuff available! Well, I did snag a few James Carr's, Soul Stirrers, Monks' and Birds', but I doubt any of them or their estates lost money by my downloads.
The issue will be how many copies will be permissable, I think. Pubs and writers typically like being paid a mechanical repro fee for each.