I found a keyboard at the dump that when turned on plays itself. The occasional faux piano notes sound at seemingly random pitches and dynamics, usually with a fair amount of space in between. It seems to be struggling to stay on, the LED blinks and flashes the whole time and notes often abruptly cut out as it resets itself. It's been my favorite thing to listen to this week.
So, naturally, between about 2:30 and 3:30 that morning I took this keyboard down back of my place by the river, turned it on and left it to play along with the frogs, mosquitoes, mysterious mammals, insects and passing cars.