You have made things very difficult by bringing steady state room curves into this, but I'll try to wade through it.
Misrepresentation by you, pure and simple.
- I have stated many times that research shows the preferred summed bass response curve tends to vary in level between individual listeners, 'to taste'. (I have also repeatedly stated (from Toole) that listeners are much more uniform in their preference for extended bass and smooth bass response...the variation relates to preferred level.)
- All the studies on room curves, including the one you mention above, are controlled listening tests. Not once, ever, have I said or implied that controlled listening tests are "all a result of cognitive bias". What were you thinking when you wrote the bolded part above? It's a ridiculous misrepresentation of my argument.
- As you will see below, that graph is not interpreted by Toole the same way as you do.
Don't be condescending. You really should cut that sort of crap out.
The only person doing any misrepresenting here is you, but I assume it is accidental.
You do understand that Toole's explanation of Fig 12.7 was that listeners are using different listening levels in the experiments, so they are compensating for Fletcher-Munson equal-loudness contours? That's not what you seem to think 12.7 is saying...
I'm talking about colouration, and so was board. We both wrote the word, clear as day. See what Toole and Olive say about preferences for coloured vs uncoloured sound... it won't be any different to what I say. Uncoloured is preferred.
And the curves you are referencing are not the frequency response of the direct sound ie first-arrival sound. You mention this, yet ignore the ramifications:-
- Floyd Toole on ASR, link
Axo, let's bring your excursion into room curves back to a discussion of cartridge response variations. Let's say you have a nice hifi system and you have got it to sound right to you with neutral sources, ie digital or a neutral cartridge. (The room curve is whatever it is.) Now throw in a highly-rated exotic cartridge that costs 10x either your neutral cartridge or your digital player's value, but just happens to have a clearly audibly non-neutral frequency response. What are the chances that you will prefer the exotic in a controlled listening test with a good range of program material? Very low obviously, because it is screwing up your good sound. But in sighted listening tests? Well, I assure you, that's completely different! And the difference is, dare I say it, driven by cognitive bias. Oops, I said it again.
This has been my whole point the whole time.
Any counter-argument along the lines of, "what about when the original system is deficient in FR in a way that the non-flat cartridge compensates?", is kind of trite. A cheap cart could be found that would do that too, but I bet the Koetsu or Kleos lover isn't hunting them down, and I bet in a sighted test they wouldn't say it sounds the same. Plus, there are plenty of exotic carts with an essentially flat FR...what then?
Guys, there is an elephant in the room, and when I say the elephant smell in the room is driven by the presence of an elephant, you are poo-pooing my argument and saying maybe someone is wearing elephant-smell deodorant!![]()
This sort of discussion would benefit from basic acknowledgements when probabilistic and deterministic results are invoked. For probabilistic results, it is to be expected that a subset of samples ("listeners") will diverge from the rule. It is also quite scientific to intentionally violate existing theories to gain new insights. It does not matter if this is for personal study or to advance the field. People build all sorts of systems with the goal to maximize their own pleasure.
But even more basic, while I actually agree with a number of @Newman's statements, his approach that somehow people would need to justify their personal choices borders madness (scientifically speaking). For illustration: I could state the following hypothesis with the challenge to analyze and disprove it with the scientific method:
My vinyl source and speakers are the best audio system in the world.
Note that the hypothesis is scientific because it is falsifiable (my system may not the be best system...).
I did not include a personal preference statement (like "best to me") to avoid any obvious preemption with individual choice
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