sjaustin wrote:
When there are differences, it is far more likely to be due to the fairly high tolerance in these parts (±20% in many cases). People's desire to have something special or rare takes care of the rest.
+1 to this. If you've got a means to measure capacitance (onboard for some multimeters, or you can order and build a cheap kit) then your best bet is to choose ones that are closest in actual value to the nominal value required. In my experience, this is FAR more important than the type of cap.
That said, polyester film caps are sort of the "gold standard" for audio, but this only matters if the cap in question is IN the audio signal path. Often, caps go to ground or the power rail and are NOT in series with the signal. In these cases, ONLY capacitance value matters! If we're talking about a bootstrap cap to ground, or a tone cap to ground like inside a guitar, then I'm pretty sure you could use a dog turd with the correct capacitance value and it wouldn't sound any different
As we sometimes say around here, "electrons don't care".
The only other item to note is that electrolytic caps tend to fail over long periods of time (the electrolyte can leak or dry out), and need to be replaced occasionally.
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Muad'zin wrote:
I want Pterodactyl sounds dammit, not a nice little analog sustain.