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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...

128x128johnread57

Showing 1 response by clearthinker

clearthinker's avatar
clearthinker
1,582 posts
 

OP has a fundamental misconception of what is meant by a flat response.  Early posters above tried to point out and correct this but to little avail and now everyone's gone off at tangents.  I'll try again.

A musical event is recorded.  The frequencies in the event are not flat - i.e. all the same sound intensity, or volume.  The objective in recording the event and replaying it on replay systems is to reproduce the event as it happened, i.e. with the loud bits loud and the soft bits soft.  The systems that are employed to do this should have a flat response, i.e. every frequency is recorded and replayed at the sound intensity/volume it had in the event.  That requires a recording and replay system that is 'flat', i.e. it treats every frequency input the same and does not make it louder or less loud that it was in the event.

Summing up.  The system is flat if it records and replays all frequencies as they occurred in the event, not louder or softer.  A flat system does not make the sound intensity of all elements of the event the same (as OP seems to apprehend, incorrectly).

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