Solving the "complex music problem"?


I have noticed that, regardless of the system, simple music (i.e. music with only a few sounds at the same time, such as a solo instrument) sounds way better than what I'll call here "complex music", meaning music like symphony that has a lot of instruments all playing different sounds at the same time. I'm assuming that this is an inherent problem for audio equipment. In a live symphony, you might have, say, 15 different unique instruments (i.e. counting all the violins as 1 unique instrument), each of which is vibrating in a different way; but in a speaker, each driver might be trying to reproduce 10 of those sounds at the same time. So each driver is a single physical object trying to vibrate in 10 different ways at the same time. The result is that the music sounds muddy, all the different parts blend together and you lose a lot of the detail.

I have a number of questions about this that I'm hoping all you experts can help me with.

1. Is there an established name or term for this issue? 

2. Do you think my diagnosis of the problem above is correct? Or is something else going on?

3. Although this is always a problem, it's a much bigger problem on some systems than others. Are there some types of components, or some brands, that are particularly good (or bad) when it comes to this issue?

4. To what extent is this issue related to the components you have as compared to speaker placement and room acoustics?

5. To me, this is a huge issue. But I don't see it discussed all that often. Why do you think that is? Or, perhaps, it is being discussed all the time, but people are using a term I don't recognize? (hence question 1).  

 

Full disclosure, I asked a related question under the heading "need amp recommendations for more separation of instruments" and got a lot of super helpful responses. I'm very grateful to everyone who took the time to respond there. That discussion was focused on a solution to my particular problem. Here I'm hoping to have a more general discussion of the issue. I know it's bad form to post the same question twice, but in my mind, this is a significantly different question. Thanks.

ahuvia

Agree with @dcoffee.  No matter what the recorded performance is, there is always just one complex signal going down your speaker wires. It's the sum of what was laid down for that channel.  Unless one's electronics are that unresolving, I'm thinking that the speaker driver is usually the limiting factor in accurate reproduction.  It would seem to be the more difficult task.  

@curiousjim 

I have never heard a system where I could hear every instrument in an orchestra, especially at louder volumes.

I don't know of a one size fits all solution, even at a live performance you need good seats for that. That problem has been studied by Tomlinson Holman and they did a lot of research into great halls and acoustics. The first reflection points and the space above the performers are key and he developed a system of speaker placement to replicate that, check this out:

 

It isn't just the signal going out to the speakers, it is also the signal goijng into the mic that compresses complex music. Hopefully new microphone technology will help resolve this problem:

 

@viridian 

 

I have not attended as many live events in relatively recent history as you have but I've also noticed on those occasions  that if I closed my eyes it was difficult to tell exactly where sounds were coming from. At the last concert there was a choir and one voice stood out. I could see who she was. If I closed my eyes her apparent location shifted further to the left and would move around a bit depending on which note she was singing. So yeah, pinpoint sound staging could be considered somewhat of a parlor trick but considering other limitations of sound reproduction I find it helpful to get a little boost there. I consider reproduced sound to be a bit of an art all it's own - like photographs or film needing curves applied to make up for the fact that printed paper or even newer HDR displays can't reproduce the actual dynamic range of many real scenes. We have to fudge a bit to get the apparent contrast or separation clarity to perceptually remind us more of reality. 

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