Dirac and room correction software

[SwissBear]

If the goal is a very good room correction, it should, IMO, also embark correction in the time domain. This would ensure that all the drivers of your speakers are time-aligned and that the sound reaches your ears at the same time, whatever the frequency.

This is one of the major sales-points of Dirac.

To illustrate, with a loudspeaker which range goes down to 20Hz, you are expecting your system to produce an impulse/step response like this:

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and what a non corrected speaker produces looks like this (B&W 802D3): the first peak is the tweeter, the second the medium and the third the woofer:

[img][/img]

With a time domain correction, you will get something like this:

[img][/img]

So, with the correction, all the drivers of your LS are aligned, and the acoustic benefit is a much deeper sound stage (sounds like 3D), and a much better separation between the instruments, voices, aso...

To reach this, you mainly have four options:

• Trinnov hardware (excellent option, but expensive)
  
• Dirac software (excellent option but need to use their software during playback with a license which is not exactly hassle free
  
• Acourate (very easy to setup and to use, even without a PhD). The only difficulty is that you need a machine running under Windows (or Mac + Parallel/VMWare) to run the measurements and to produce the correction. Once you have the correction, you have no limitation related to license and can use you whatever system you want to reproduce it. There is an extensive demonstration of Acourate in the field of room correction here: http://www.computeraudiophile.com/conten...lkthrough/
  
• REW/rePhase which does the same, at the cost of a deeper understanding of what you are doing. But this is a free and highly customizable solution.
  

In the last two cases, the correction process involves impulses. You can make the convolution of these impulses with your music using JRiver or Roon/HQPlayer.

There is an extensive coverage of the latter here (http://www.computeraudiophile.com/f11-so...yer-20293/) and in the adjacent threads. The quality of HQPlayer playback, together with the ease of use of Roon, has gathered a lot of interest it seems.

If you are interested in testing a correction made with REW/rePhase, just send me a link which allows me to download the measurements you have made with REW. I will have a look at it and hopefully be able to make a correction proposal.