Theoretically it's possible, because a thermin works along those lines. However, I haven't seen an DIY application that involves a relatively dense cluster of buttons. That leads me to believe it might be difficult or impractical to achieve.
Theoretically it's possible, because a thermin works along those lines. However, I haven't seen an DIY application that involves a relatively dense cluster of buttons. That leads me to believe it might be difficult or impractical to achieve.