@rvpiano-re the question of master tapes as a source, my impression is that most of the majors will not let the master tape out of the door, and usually supply a flat transfer on hi-rez. There are of course exceptions- the "audiophile labels" like Acoustic Sounds and a few others (Classic, ORG, MoFi in some cases) do get access to the tapes, probably because of long working relationships with the labels. For digital streaming, I suspect that if the end product is a digital file, there is even less likelihood that a master tape was used as a source, and which master? A safety? A copy made for a particular market may sound different than another. It’s the stuff that keeps record hounds searching, comparing notes and pressings. I don’t know the answer as it applies to streaming, which was one of my questions earlier in this thread- whether the streaming platforms identify the source and mastering.
What I wrote above really applies to older recordings where tape was the medium. If you are a Steve Wilson fan, you’ll know that he remixes a lot of this stuff (mainly prog rock) in the digital domain using the multitracks and eschews ’mastering’ as such, believing that his mixes are the final product without more EQ (apart from what may be necessary to meet an RIAA curve for the LP releases). Some of that stuff is pretty good if you are a fan of this type of music.
What I wrote above really applies to older recordings where tape was the medium. If you are a Steve Wilson fan, you’ll know that he remixes a lot of this stuff (mainly prog rock) in the digital domain using the multitracks and eschews ’mastering’ as such, believing that his mixes are the final product without more EQ (apart from what may be necessary to meet an RIAA curve for the LP releases). Some of that stuff is pretty good if you are a fan of this type of music.