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

Showing 6 responses by thespeakerdude

@frogman ,

 

It's not just the composer, or the conductor, it's also the placement of the musicians and the hall and how it is recorded. 

 

If you can pinpoint two musicians in a piece where that is not the intention then the flaw isn't at playback but the setup of the performance, the hall, and the recording.  You can't extract what isn't there.

 

@ahuvia

 

Looking only at the speaker, what you are describing is intermodulation distortion. It’s intermodulation distortion in components too, but unless you have poor or poorly set up vinyl (or listening to inner groove songs) , or highly distorting tube gear the rest of your component aren’t contributing much to this (always rare exceptions).

 

The rest of the issue and probably dominant is your speakers and room as a system. Too strong of first reflections off walls, floor and ceiling, too much back wall reflection energy, front was reinforcement and suckout, and reverberation in general. *Add in that all these reflections in combination with the speaker dispersion can have vastly different effect depending on frequency. That’s why some component changes can appear to help the problem by changing tonal balance but at that point you are painting the pig.*

 

What can you do?

  • Get your speakers away from walls if you can
  • Toe the speakers more in towards the listening position
  • Treat the first reflections points and front and back walls
  • Fix bass nodes issues
  • Use advanced room correction
  • Use speakers with better (and consistent) directivity control. Speakers with waveguides, well designed horns, etc. Floor to ceiling line sources can be good too but can introduce new problems if you don’t implement properly.

 

Multichannel has advantages as the direct sound will be louder in the intended direction towards your ears, but you still need to address the room. It is not a magic bullet.

 

That's more clear @frogman , thank you. I think that is a common outcome in setups. People say what they did, then claim to have way better imaging but what they did can't do anything but the opposite.

@ahuvia 

 

Your picture link does not work.

The NAD M10 is likely not your weak link. Your speakers 20" from the front wall probably is.  Can you get the front of the speaker at least 6 feet from the front wall?  If not, keep the M10, and invest in some broadband bass trap panels for behind the speakers. That will do more than upgrading the M10.

How far are the speakers from the side wall?

6 feet from the front wall? Ridiculous...just put the speakers outside in a field away from trees, or put bass traps on the trees. Or...don't fear the "room sound" as most (all?) music is played in rooms...it makes things sound...dare I say...REAL?

6 feet from the front of the speakers is not very far. I want to sound of the room used for the recording or some simulation of. I don't want the sound of my room multiplied by that rooms sound. That is where the confusion comes in.