Hi,
I recommend to use a properly designed filter. RC, LC, damped LC...
You say you use the EPOT as audio volume control.
64 steps of linear attenuation isn´t very useful for audio. I expect at the low level end (silent music) huge steps..so that maybe the one setup is too loud, but next lower level is too silent.
..and opposite at the upper end: you need a lot of steps to recognize a difference in loudness.
Thus I recommend to use dedicated audio volume control ICs.
Or at least a digital pot with logarithmic characteristic.
Klaus