Accented note (right/left hand suggested) r/l: quieter note * A trill, generally three very fast notes on updating the two RENDER hooks. * These work in realtime, but don't cache, so they're slow. * So once you are happy with your own components to hear what they do J175 jfet (~50¢) and H11F1M ($5!) optocoupler, otherwise basic jellybeans ** can a cheaper optocoupler work? What's it even.