I purchased a used Yamaha Clavinova CVP-65 and there are two 1/4" female output jacks labeled L/L+R and R on the underside. The manual does not indicate if these are balanced to be used with two male TRS cables or unbalanced to be used with two TS cables. The manual does state that if I only plug into the L/L+R that I will get monaural audio out.
Ultimately I want to plug the output into my computer audio interface. That ends up being about a 25' cable run and is the reason that I would want to use balanced if I can.
Is there any easy way to tell, short of disassembling the piano, if they are balanced or unbalanced? Perhaps using a TRS cable and clipping a voltmeter to the tip and comparing the output between the ring and sleeve?
Any help would be greatly appreciated.