Almarg, you said,
"Scientific investigation and scientific progress draw upon a combination of observation, experimentation, analysis, technical understanding, and (dare I say it) reasoned judgment and common sense, among other factors. I see no reason for audio to be any different."
I see many reasons why this is different for audio. One need look no further that the cable controversy, now more than 30 years old, with no resolution in sight. Amplifiers with the lowest THD always sound better than one with higher THD, even 10 times higher. I implore you, is that reasonable, does that make sense? Extremely thin cables can sound better than much thicker ones. Again, does that make sense? Mpingo discs - how can one small 1 1/2 inch ebony disc in the room completely change the sound? It doesn't make sense. Green pens for coloring CD? Doesn't make sense. Schumann frequency generators that improve the sound? That's patently absurd. Intelligent chip with quantum dots improves the sound of CDs? Ridiculous. A cream that improves the sound of CDs or LPs when applied to the surface of the disc. Now, don't tell me that makes sense. Quartz, topaz, tourmaline and other types of Crystals for everything from cables and power cord plugs to room corners and electronics. Is that reasonable?
Tiny little bowls that improve the sound, even bass frequencies. I implore you, does that make sense? I'm afraid what we have is a revolution in how we look at the hobby of audio. Of course, we could ignore it, but doesn't it make more sense, and isn't it more reasonable, to take advantage of these new technologies to improve our lot?