You seem to be analysing words out of context, which is pointless. There is always context. I variously use the words "song", "recording", "piece", "album", "tr

You seem to be analysing words out of context, which is pointless. There is always context. I variously use the words "song", "recording", "piece", "album", "track" etc. depending on what type of music I'm talking about and in which context. "Piece" always works when talking about classical music. "Song" usually works when talking about popular music. "Track" works in most cases when talking about recorded music (apart from classical). But it would make no sense to refer to a song I'm about to play on guitar as a "track". Nor would it make sense to call a solo piece a "song". My point wasn't really about "correct" terminology, though, but merely that in some people's minds music is songs and anything else (ie. without lyrics, and yes, lyrics, not vocals) is not appreciated.