I think that’s around the lowest Eb on the piano, so the technology is theređŸ˜‰
“I think that’s around the lowest Eb on the piano, so the technology is there.”
On an electric bass at concert pitch, the open E string vibrates at 42 hertz. With a tuner, you can easily tune that to 40, and detune the other strings 2 hertz so the tuning all matches. The same can be done with every electric keyboard I’ve seen for years now. Tune the keyboard down 2 “cents” from 440 hertz (A note) to 438 and the low E will be at 40 hertz.