Every stand of the wire is insulated individually with a thin layer of varnish like in a transformator. This gives you lower impedance at high frequencies due to reduced skinn effekt.
Last year I have been developing a small inductive heater running at 100kHz and we got by far the lowest impedance using HF litz wire. And 100kHz is not that for of the audio band. Using some leftover wire was rather cost effictive
Capacitance and inductance is not specifed, but I could measure that - well not today, as the measurement equipment is at my workplace and I'm at home.