Self-explanatory. After hearing the whoosh sound when doing stuff in osu!test and the updates, I thought it would be fun if we got a little whoosh sound in there too, it's volume depending on the speed of the dash.
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Whoosh sound when dashing in CtB
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I can't imagine playing with that. There better be a way to disable this if it's implemented.
Just make the whoosh sound play on hyperdash notes as hitsounds 
I would prefer to play without any interrupting sounds.