Do audio capacitors have polarity??? I guess so!!!
Experiment all kind of caps and test the polarity when you mod a guitar (tone control) or a pedal, this worth a value so much. The sound changes, depending on the capacitor type and the polarity you use. In the mods is important to try out any capacitor, with the value desired, that you own, even if it is the same type. It is cheap, so buy a lot of then.
*I have used a strat with a 500k volume pot at the tests, to listen the highs easiest.