So, audio stuff is still a bit of pipe dream, but I want to at least try at some point. Easiest would be something like what OhMiBod puts out, which is basical

So, audio stuff is still a bit of pipe dream, but I want to at least try at some point. Easiest would be something like what OhMiBod puts out, which is basically just a vibrator with an RC band pass filter as speed control. We could generate audio to work within the sensed reaction range there. Electrostimulation toys also use waveform input, since it's translating signal-to-signal basically, but that's a whole other huge discussion. Finally, if you consider HD Rumble (think what's in a Switch Joycon or VR controller), those also take audio buffers since they can deal with far higher update rates than eccentric motors.