(Sorry to resurrect a 5-year-old thread, but this came up while I was replying to What is to be considered a remix? .)
If this is the commonly-accepted definition of “karaoke” and “instrumental”, then I’m worried that MB’s relationship names and descriptions are causing confusion.
Most of the releases and tracks that I come across that call themselves “instrumental” seem to meet your definition of “karaoke”, i.e. the original recordings minus the vocal tracks without a new instrument added to play the melody:
- https://musicbrainz.org/release/936131e9-b263-44ed-b503-986de40216cd (vs. https://musicbrainz.org/release/a3e875b4-12a1-493a-af77-700e46819870)
- Release group “AVW // Instrumental” by Intervals - MusicBrainz (vs. Release group “A Voice Within” by Intervals - MusicBrainz)
- Recording “The Point of No Return (instrumental)” by Haken - MusicBrainz (vs. Recording “The Point of No Return” by Haken - MusicBrainz)
Relationship type / Karaoke - MusicBrainz has the following description (emphasis mine):
This is used to link a karaoke version of a song to the original song.
A karaoke version is a version of the song with the main vocals removed, designed to be used for karaoke. These are generally produced from the original masters by muting the main vocal track or by using post-processing filters to remove the vocals. Karaoke versions can be found labelled in numerous different ways other than “karaoke”: instrumental (even if backing vocals are still present), off vocal, backing track, etc.
I don’t have any reason to believe that the examples I gave were “designed to be used for karaoke” (“a type of interactive entertainment usually offered in clubs and bars, where people sing along to recorded music using a microphone” per Wikipedia), so I wouldn’t use this relationship type for any of them.
Relationship attribute / Instrumental - MusicBrainz has this description:
For works that have lyrics, this indicates that those lyrics are not relevant to this recording. Examples include instrumental arrangements, or “beats” from hip-hop songs which may be reused with different lyrics.
This seems to deliberately include hip-hop backing tracks with vocal tracks removed from the mix. Like you, I wouldn’t want to use a recording-work relationship for these since it’s a “loose” type that only relates the new recording to the original composition (rather than to the original recording).
Going just by the official guidance, I’d probably be most likely to choose either Relationship type / Edit - MusicBrainz or Relationship type / Remix - MusicBrainz for “minus-the-vocals” recordings. Here’s how Terminology - MusicBrainz describes “remix” (emphasis in the original):
A substantially altered version of a song, produced by mixing together individual tracks or segments of one or more source works. The artist doing the remixing can be the original artist. The source audio material can be from any part of the process; including the final mix, master, remaster, or original raw audio materials. If the tracks have been significantly modified, more than is necessary to produce a continuous mix, then the action described by relationships is considered to be remixing, not compilation or DJ mixing. Note: not everything called “remix” is really a remix in the classic sense. In hip hop especially, it’s typical to call “remix” to a new version of a song with different guest rappers; these should probably not be linked to any artist as “remixer”.
I think that it would be clearer if “designed to be used for karaoke” were removed from the “karaoke version of” description. I’d probably go further and rename the type as well if that’s feasible. If “instrumental” isn’t an option, maybe “minus-vocals version of” or “vocal-less version of”? I’m not sure that there’s any good word for this in English.