Thanks everyone for sharing your perspectives. Love the humour, good cheer and facts shared.
Is a FLAT response the IDEAL?
Sounds in nature are not a flat response, quite often, there are natural attenuators, accelerators and amplifiers, including horns (caves), wind and water, let alone reflections, absorption and diffraction.
Similarly the holy grail (one of them) of recreating outdoor, concert or live music, and so on, abound with these shifts in the environment or context where the experience happens and the recording takes place. Are we depending on the mic positioning, and mic performance, along with mixing equipment, format and so on, to enable recreation of the environment when moving to playback. How does a flat response curve help?
Of course, we have DSP. For Club, Hall, Rock, Indoor, Outdoor and may other shifts to music recordings. And mastering adds reverb as another way to create a 3D version of context/venue. These are averaging processes that apply universal shifts to shape a standard curve across the music stream continuously.
So why is it that we pursue flat response curves? Or DSP generated fixed curves? How does flat recreate that live ’being there’ experience.
When designing equipment including components, such as DACs, and speakers, most seek to judge against a flat frequency response.
Mind you, how on earth can we allow other than flat. Turntables as most here know, use the RIAA curve to fix the problems of hearing that itself is not flat. But even that is aimed to deliver a flat hearing response.
I don’t understand. If we are trying to model or capture the original event, how does flattening everything help? And, what are the alternatives? How do we achieve close to the venue or location, given so many unique variables, that our approximations just don’t seem close to the original. It’s no wonder... Have we selected flat because it is the best average we’ve got?
Do immersive audio methods of sound reproduction do it better? Some prefer pure stereo, some like DSP, some multi-channel and multi-speaker methods including ambiophonics.
Where does the ’flat curve’ fit into the equation here, vs say cross-over design or powered speakers or upgrades as a priority? Should we care about it?
Well that’s enough to launch this inquiry...
Showing 4 responses by johnread57
Nice unsupported accusations about me there. Here’s some quotes from Wiki “The purposes of the equalization are to permit greater recording times (by decreasing the mean width of each groove), to improve sound quality, and to reduce the groove damage that would otherwise arise during playback.” And… ”RIAA equalization is a form of pre-emphasis on recording and de-emphasis on playback. A recording is made with the low frequenciesreduced and the high frequencies boosted, and on playback, the opposite occurs. The net result is a flat frequency response, but with attenuation of high-frequency noise such as hiss and clicks that arise from the recording medium. Reducing the low frequencies also limits the excursions the cutter needs to make when cutting a groove. Groove width is thus reduced, allowing more grooves to fit into a given surface area, permitting longer recording times. This also reduces physical stresses on the stylus, which might otherwise cause distortion or groove damage during playback.”
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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? ;-)
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