Street artist playing Hallelujah with crystal glasses

Just wow!

YouTube Description:

The most amazing thing I've seen, no playback and no nonsense only with glasses!!!הדבר הכי מדהים שיצא לי לראות, בלי פלייבק ובלי שטויות רק בעזרת כוסות!!!
siftbotsays...

Tags for this video have been changed from 'hallelujah, glass harp, crystal, glass, glasses, street artist, play' to 'Cohen, hallelujah, glass harp, crystal, glass, glasses, street artist, play' - edited by chingalera

messengersays...

Fine. You've made me put my physics hat on:

The pitch is determined not by the surface area of the water, but by the surface area of empty portion of the glass. Since his glasses bow out then taper in, some glasses would end up with a greater surface area of water if some evaporated, and some with less, so the relative rates of evaporation would not be in sync. Also, it seems no two glasses are the same shape, so even if they were all the same note to begin with, evaporation and pitch change would not be even.

deathcowsaid:

Maybe the entire thing shifts tune in unison. Larger glasses have larger surface area, faster evaporation.

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