Non-polarized capacitors are polarized, so you can orient them one way and get one sound / reading and flip them around and get different sound / readings.
Really? I guess I have learned something then. I just had Andy Bartha, who does mods over for a DAC shootout and he showed me the guts of his mods to a Musical Fidelity upsampling DAC (BTW - the Perpetual Tech with Dan Wright's mods sounds better IMO). Andy swears by non-polarized black-gate caps. However, he uses them in the power-supply and decoupling, which is polarized by definition. Is there a way to tell which way to install would be best?