Boards
I HAVE INVENTED SOMETHING INCREDIBLE!!!
...so I'm wearing my headphones, and I start absently twanging the lead attached to one of the cans and I find that by varying the tension I can control which note I hear.
Conclusion: I have EAR BASS!!
...now, if I could find a way so that I'm not the only one, by definition, who could ever hear what I'm playing, I could be rich! RICH!