I would like to connect a Yamaha P155 Keyboard to an Apple Macintosh G5 using the keyboards' AUX OUT L+R outputs and the Mac's MIC IN inputs. I have read on these forums that one needs to know if the AUX OUT outputs are balanced or unbalanced. This is not mentioned in the keyboard's documentation. I am not even sure the AUX OUT are line level since the master volume knob on the keyboard can be used to control the AUX OUT volume. How can I tell if the outputs are balanced or unbalanced? Is this also an issue with the computer's MIC IN input? Does this mean that I need different cables for balanced than for unbalanced? Any help is appreciated. Thank you.