I was looking at a tide table to find minus tides during the daytime to go poke at creatures and I thought that the fairly regular wavelength would make some very boring music. If you sped up the frequency from days to kHz and had feet represent either volts delivered to a speaker, or actual sound waves you would hear something. Probably a very regular tone that varied more in volume than anything else, but you could always process the signal to make it more interesting.
Would anyone have a hint for a scheme to capture online tide table data and then a (free)program to convert it to usable audio? I know this is a ridiculous project, but it's not a good day to go fishing.