unplug your headphones, turn your speakers up, and enable mic access

or don't, i'm not the boss of you

ok but what is this?

this uses web speech APIs to turn text into sound and back into text over and over, using your microphone and speakers.

for extra fun, turn on some instrumental music at 60 or 120bpm while you run this thing. many examples

or, for your convenience, just click play on this

onward