Definitely not the latter.Quote
What do you personally think makes music a "strong survival trait"?
Is it just base line, strutting peacockery?
When people were out of sight of one another, they would, having already evolved from species which communicated by sounds, have realised that a series of notes, vocalised in a certain way, greatly aided communication. they would have found out the different ways the voice and language could be used, so adapting that to distances, with whistles etc, would have greatly increased safety.
The sounds of various voices making harmonies would have been of strong group benefit.
What do you think?