Let me see, where did my flat response misunderstanding start... I'm a logical thinker, other than when I'm not, and can be both at times.
Flat response to me does not speak at all to it's meaning in use here in the audio world. 'Flat response' suggests an outcome that is flat. Clearly not the intention. I get that.
Let me repeat my problem. Flat response suggests an outcome that is flat. Just plain simple English. Maybe neutral not flat, or unchanged and not flat either. Neutral or unchanged far better convey the intention not to add anything or take anything away be it frequency, amplitude, place, timing and so on. Flat? No. Flat means flat. Flat what? At each and every moment in time, being measured, by a mic or ears or whatever, there is no additional (or loss of) information, change or disturbance, perturbation or otherwise in (tempted to say the force...) but will say the music/audio signal(s) being heard or recorded. Flat? No. Doesn't make any sense yet. To me.
Just accept it mate. Ok, throw away logic. Not yet.
Flat is a state not a transformation. In mathematics which I studied (among other things) a flat transformation (as a term or as a function) doesn't exist as far as I know. Other than its equivalent here - a zero transformation. Yet, here, the term flat transformation means no transformation (like in the maths sense), no changes are made to the original audio signals. You see I am trying to talk my way into understanding this term.
But the mind wants to think, flat means to flatten. And that drift, that urge is driving my misunderstanding. Response is an action (a verb), a flat response in this case is a zero action. This is an oxymoron. Ahhhh. And I think it's the juxtaposition of these two terms that is triggering my mind to think flatten - otherwise it doesn't make sense, logic. Zero response (I like zero transformation even better), easier to comprehend in this case, than flat response. Flat is a shape descriptive, flat surface, flat tyre, flat land, what do you imagine a flat response looks like? Visually? Duh?
Flat response means no response. Since when does flat mean none? Flat means flat. Flat response, is an oxymoron. You mean zero response, and here we go again, unchanged.
Now I understand why I don't like the inadequacy of this phrase. Its an oxymoron. Unless someone can show me otherwise. Its an acculturation rather than a matter of logic, that has combined poor word choices into a phrase.
If a person gives a flat response, what would she/he be saying or doing? Nothing? This phrase doesn't make any sense. Just as it doesn't with mic's, equipment or anything else for that matter. No response, zero response, no transformation, no change (more simply), these are all easily understood alternatives, that don't risk sliding into oxymorons.
Are you giving me a flat response here? You speak in oxymorons? ;-)