I'm designing a portable low-level audio circuit to be powered from a 9V battery. I'm aiming for quality that's considerably better than cheap public address gear but not quite audiophool perfection. It uses eight low-noise opamps (4 duals) and involves balanced-to-unbalanced conversion and vice versa, some gain, volume controls, etc.
My question here is about the technique for setting the 0.5Vcc opamp input bias. I could use an opamp voltage divider but that would mean adding an extra IC. Cost is not an issue, but I'm rather partial to simple elegance. Would a parallel R-C divider be good enough or could it raise some quality or stability issues?