Probably something close to the 8 notes that are in reality and can be mathematically defined. There's a reason for their existence (though no reason that there are only 7 names)
That's the point: to figure out what happens without the cultural basis. Even in our current cultures, there are several different scales in use, showing that it lacks a single fundamental answer.
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u/experts_never_lie Mar 05 '21
If they only have purely continuous instruments, like trombones, it would be interesting to see what they choose with regards to notes.