I have a digital piano, KORG SP-250, that has unbalanced output, and a sound card Focusrite Clarett 4pre-USB that has balanced input (line level or mic). I now wonder, what will happen when I connect these two?
I don't know how the unbalanced connector work, so is the the signal sent in the shielding as well as the signal lead? Since the sound card is balanced I guess its shield is connected to ground. That makes me think that it's sufficient with either the sender or receiver to be balanced, because it's sufficient with one connecting to ground?
(Also I wonder, can both line and mic-level be balanced or is it only a mic signal that can?)