Strings were removed from 'Always On My Mind' and 'It's A Matter Of Time' before release, although some strings can still be heard on the released master of 'Always On My Mind'.
The undubbed masters on Our Memories Of Elvis weren't really the pure undubbed masters. They
were the fully overdubbed or regular masters but
with certain instruments and backing vocal channels
removed or stripped down.
Takes 2 and 3 of 'Always On My Mind' on
the Platinum - A Life In Music box-set and the bootleg Let It Roll have left
and right channels swapped.
What is listed as being the undubbed master of
'Always On My Mind' on the Venus bootleg
Unedited Masters - Hollywood To Nashville
1972-1980 is actually Take 3.
The ''Strings'' version of 'Always On My Mind'
on the 1985 compilation album Always On My Mind and the Japanese Complete Single Collection does not have the piano intro that is present
on the overdubbed acetate and the Venus bootleg
Unedited Masters - Hollywood To Nashville
1972-1980 - This appears to be a different
mix.
An edited (2:27) version of 'Always On My Mind',
with omitted verse ("Maybe I didn't hold
you all those lonely, lonely times..." to
"You were always on my mind, you were always
on my mind..."), was released in 1987 on
the BMG Ariola release The Definitive Country
Album.
The re-recording of 'Always On My Mind' can found on the 2016 album The Wonder Of You, which contained Elvis' original vocals but with new backings by The Royal Philharmonic Orchestra, and which actually went to number one in the UK album charts.
The overdubbed master of 'It's A Matter Of
Time' on the Venus bootleg Unedited
Masters - Hollywood To Nashville 1972-1980 comes from a tape source as opposed to the overdubbed
master that appeared on For The Good Times from an acetate source.
In March of 2007, Sony decided to go through all of Elvis' masters. They retransferred everything and remastered all tracks including repairing as many clicks, pops, bad edits and dropouts as they could. They have used these newly mastered recordings on their new releases since 2007 including budget soundtracks, Legacy releases, the 30 disc Complete Elvis Presley Masters collection and the Franklin Mint package.
Thanks to Adrian V Stokes regarding the edited
versions of songs on the BMG Ariola set of Definitive albums.