Re: Vitamin Q 0.022
Some people believe the dielectric type makes a difference the human ear can detect, some believe it doesn't, but ultimately one side must right and the other must be wrong, we just don't know who is right and who is wrong at thus juncture.
No that is a totally false statement. When the first wax reel music players came out, people said they were shocked because they were so realistic it was like the person was in the room with them. If you listened to them today, you would disagree, and neither of you would be wrong. It is based on the hardware on your head and the software in between. It's relative.
I am one of those who has done the listening tests, and without the bias toward expense. In fact, you could argue that I would have been listening to
justify the lower cost capacitors for use in OEM manufacturing. Now the reality is I listen with no bias, always. But that's not important.
I have heard a difference, unrelated to slight value shifts. How do I know? Because you can test on either side of the part and see if the behavioral shift follows the dielectric or the value. In other words, get three PIO caps, .022 dead on tolerance, and one on either side of tolerance by a bit. Then get a ceramic disc that is dead on to the target .022 PIO. Listen to the control against all three PIO variables and you'll hear (or not hear) the difference between the two that are dead on target. To truly understand it is a longer experiment, but I can tell you that I can hear the differences, and feel the differences across the dynamic range, the attack, etc.
If someone else, for the life of them, with their ears pressed up against the amp can NOT hear the difference, it doesn't make my statement false. It means it is beyond their ability to hear and I trust their honesty in that. Suffice it to say, if a graph or chart plots the two as identical, I couldn't care less, because it would just mean they haven't created the right kind of test. It's not just frequency response, there can be differences in phase linearity and the transient response that their test is not picking up. The audio exercise, and especially music creation that includes a bio-feedback loop to the human being is not (and never is) just a frequency response curve.