@tek0010 said:

Natural Volume, in contrast, is not a matter of taste. It's a matter of simulation of a real orchestra in a real room. The simulation is either accurate or it's not. This is science, and it has nothing to do with artistic preference.

It's accurate enough. You'll still have to use your ears - artist or not. That's just the reality of it. And we're not talking about "taste" either, but about function.

"Science" is a big word here. As well as "simulation". How accurate can the simulation of natural volume be, if the whole of the instrument in the simulation is represented by merely a few velocity layers? Just one example. There are so many factors that play into this.

@Dietz said:

I hardly dare to say "yes" - unless you promise not to use these values as rules, but rather as starting points for your own settings. 😊

Kind regards,

Well, of course it is only a starting point, but this information is absolutely crucial. As a rule of thumb one can say that the volume is reduced by half ( which means -6db) when the distance is doubled. So, if you sit in the 1st row and have the strings sitting 4m in average away from you while the brass is 8m apart and the tamtam 10 there would be an offset of 6db for the brass and maybe another one, totaling 7db for the percussion.

In reality, things are slighty more complex than that. There's some interesting, highly condensed information available on this famous site:

-> http://www.sengpielaudio.com/calculatorSonephon.htm

... this is a short quote from that page that gives us something to chew on:

@Another User said:

"Set the volume of the radio double as loud or half as loud." Who does not know, how to do this, is a normal person. Psycho-acousticians are telling us, that it has to be 10 dB level difference. Try to cool your hot coffee to the point "half as hot" - and think it over. Your own feeling may be much different to other persons.

An increase from 6 dB to 10 dB is perceived by most listeners as "double" the volume. These sensations are highly subjective, meaning that different people will hear this in different ways, and "twice as loud" is a much harder thing to guess than something.

The human perception of loudness is perceived differently from each subject. In other words it is one's own perception of sound and it is subjective of sound pressure level SPL.

... to add a personal note to the subject: I'm a mixing music professionally since almost 30 years now, and I've not once felt the necessity to stick to any kind of rule for finding a good balance between all the elements involved  (... "good" in the sense of: Plausible and pleasing, not according to a code).

And in those cases where the balance wasn't _that_ good in the end, a list of values wouldn't have helped a lot, believe me!  😳 🎉

😉

To coin a phrase: When we talk about the "realism" of virtual orchestration (or any kind of recorded music, actually), we don't mean the raw, merciless realism of a surveillance camera, but rather the well-shaped, thoroughly designed and edited visual impression of a movie. 

Kind regards,

There's a clear, undisputable formula to define a circle. There's no formula to define "the" microphone (or a human ear drum in the real world.), though. Two types of microphones will give you different results, even when they're put in the the same position. Two audio engineers will create differernt results when asked to re-create their impressions (or their idea) of an orchestra playing in a certain space.

Science and art are of equal importance for human society, but the aren't the same. Trivial, but still something to keep in mind. The concepts which MIR is based on are scientifically underpinned, but its aims are purely artistic, not technical.

Kind regards,

I'm happy that this question makes so many people discuss and all the answers are very interesting and helpful.

@Another User said:

Some here are confusing Natural Volume with Artistic Volume. Artistic Volume is a matter of taste. There are no rules. Use your ears. This is art, and it's all about the artists.

Natural Volume, in contrast, is not a matter of taste. It's a matter of simulation of a real orchestra in a real room. The simulation is either accurate or it's not. This is science, and it has nothing to do with artistic preference.

All my, sometimes vague, questions, which might sound like a cry for a "world formula", are just aiming at learning to differentiate between what he/she divides into "natural" and "artisitc" volume/rules and have the first settled to learn about and work with the latter. 😊 Or to keep it short and simple: Get the science right and have my "personal orchestra" at hand on which I can more or less rely - which keeps me within the bounds of realism, while exploring... 😄

Thanks to you again,
Lukas

@Another User said:

The concepts which MIR is based on are scientifically underpinned, but its aims are purely artistic, not technical.

I'll take VSL's "Natural Volume" accordingly.

I still want tools which automatically simulate the air-pressure from an orchestra measured at a specific point in virtual space. I mean this as a benign statement about myself; but at this rate, I expect some will object, and maybe some will even accuse me of seeking a "perfect mix button" -- when I'm actually seeking no such thing.

Mr/Mrs. tek0010, you and your IP address remind me of a certain user several months ago ... hmmm.  🤔 

But anyway:

@Dietz said:

There's a clear, undisputable formula to define a circle.

Similarly, there's clear undisputable math describing the air-pressure at a spatial point some defined distance from a sound-source:

[...]

... which has nothing to do with a presumed "scientific volume" of an instrument on a stage. So many variables with fuzzy definitions: Which instrument? Who's the player? What notes were played? On what stage? And: Who has been listening?

To simplify the quest for an answer to all of these questions is what MIR's "Natural Volume" feature was meant to be used for. It's based on extensive measurements of instruments, fine-tuned by ear. It should be seen as suggestion, not as a rule, because there can't be one. 

                         ******

Dear all: I think that all aspects of this issue have been covered now, and I would suggest to close this thread now, before we start runnig in circles. Thanks for your understanding.

deleted...