Secondly, there's the issue of "soloists" and what I wonder is a separate consideration of "performers" or other personnel (instrumentalists) on the album, whoa re not strictly speaking "soloists" (sometimes both of these categories may appear on an album at once: two or three named soloists, and orchestra, then: others, or other performers... say: "Triangle, played by: Billy Tinkle", "wooden block played by Michael Mahogany", or something like that.