Playing A Piano Filled With Water

Ever wonder what a piano would sound like if its soundboard was completely submerged in water? Well you’re in luck, because Youtuber/piano sadist Mattias Krantz does just that in this video, which may also double as a long-form commercial for Flex Seal. The piano sounds completely different depending on whether Mattias has the regular mics or underwater mics turned on to record the instrument, which makes sense considering sound travels more than 4X faster in water than air (~1,480m/s vs 343m/s). Of course I expected this having already performed my own acoustic experiments in a neighbor’s pool farting.