I like the fact that Danny makes a strong argument that a false dichotomy is being assumed between "objective" and "subjective"** in the context of audio, and Danny argues against it.
The core of the false dichotomy is the idea that objective measurements and subjective listening are *mutually exclusive* and opposing forces. This leads to camps of "objectivists" who dismiss anything not quantifiable, and "subjectivists" who may disregard measurements entirely. Danny actively tries to dismantle this by stating, "you can't rely on one only you have to use all of the tools that are available to you."
Danny points out that there is an over-simplification of "Objective Data." That is, the "objective" side often falls into the trap of believing that *all* relevant sonic information can be captured by current measurement techniques, and that a "flat" or "perfect" measurement always equates to superior sound. This is challenged with examples involving (a) parts quality, (b) an fact that a lot of distortion is not audible (and this highlights that while measurements are objective, their *relevance to human perception* is subjective), and (c) that measurements often focus heavily on frequency response and distortion but other things matter a lot, including "spatial cues," "soundstage layering," "speed," "resolution," and "air and extension" which are much harder to fully capture with simple amplitude or frequency sweeps, and often require more complex measurement suites (e.g., directivity, decay characteristics, or even novel psychoacoustic metrics) that are not always universally understood or applied.
On the other hand, the "subjective" side can fall into the trap of relying solely on anecdote or personal bias. However, Danny points out that our ears, especially in a properly set up listening environment, are incredibly sensitive and capable of discerning differences that current common measurements might miss or not fully explain. (His example of the notch filter illustrates this.)
I like the fact that Danny's approach is to advocate for a **synergistic relationship** where objective measurements identify problems and guide design choices, while subjective listening validates those choices, discerns subtle differences, and ultimately confirms the desired sonic outcome. They are not opposing forces, but rather complementary tools in the pursuit of better audio reproduction.