panuma

I see Birkenstocks as orthopedic shoes that shouldn't be worn on a healthy foot. Think what happens if you push a brick in an arch from below. Huaraches, Luna sandals etc. are a better option healthwise, people run ultramarathons in them and the design has thousands of years of history.

Superior time perception for lower musical pitch explains why bass-ranged instruments lay down musical rhythms http://www.pnas.org/content/111/28/10383

https://www.researchgate.net/profile/Robert_Jack4/publicatio...

This claims that for percussionists 20ms is too much but 10ms is not. As a bassist I disagree, and think under 5ms is acceptable.

Speed of sound in e.g. wood is 10 times faster than in air. So an electric guitar player with 3.4m cord to the amp can feel a latency of 1ms for low frequencies through the stage and his feet. Humans have more rhythmical precision with said low frequencies. Symphonic orchestras are not known for their tight rhythm.