twisted pairs really look more like a capacitor and an inductor
Twisting would increase capacitance not decrease it. Doesn't matter anyway because the skin effect and wire capacitance are irrelevant at audio frequencies.
Just my point. The increased length of conductors running parallel to each other increases the capacitance (in some R.F. applications very small values of capacitance can be made with two short lengths of insulated wire which are twisted or untwisted to adjust), and the transmission-line effects of combined capacitance and inductance are insignificant at <20kHz for the length of cable runs involved.
The cable capacitance could start to become significant and attenuate higher audio frequencies if we were talking about a high-impedance circuit, but in this application the sourece impedance is simply far too low for it be an issue.
