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> encouraged by the tempo of the music progressively increasing to the end of HVB

How does this part work? No real music does this so did they make their own for the study? Or do they select songs that change tempo subtley from one to the next?

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They could have made their own, but it's really not that uncommon for music to slowly increase in tempo. Some styles of music use it more than others - for instance, ceremonial drumming might start out extremely slow and build to a frantic climax. But it's also fairly normal for musicians who are playing live, rather than to a click, to speed up when the music gets more intense.

I'm all for ceremonial drumming but there's gotta be a specific pace that fits their definition of "progressively" and i feel like that detail is lacking. Maybe there's more in the paper proper but the appendix is quite vague.

No real music gradually increases tempo? Isn't that like sailors hornpipe, kalinka, and various other russian folk songs?

Should i have clarified "no music you can find online or otherwise make use of in any way"? I appreciate the honest effort to come up with things! I'll see if i can find that anywhere and of appropriate length.

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