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Old 29th May 2020, 07:46 PM   #2111
napilopez is offline napilopez  United States
diyAudio Member
 
Join Date: Jun 2019
Quote:
Originally Posted by Stankor View Post
***I don’t know anything about it! Please tell us what it is about? What is this? Thank!
Oleg
Hi Stankor. VituixCAD is able to automatically calculate the 'Early Reflections' curve from CTA-2034A or 'Spinorama' standard. But the Early Reflections Curve itself is made up of five averages:

Front: Horizontal Average of 0, +/- 10,20,30 degrees
Side: +- 40, 50, 60, 70, 80
Rear: 180, +/- 90, 100, 110...170
Ceiling: Vertical +40,50,60
Floor: Vertical - 20, 30, 40

These curves can further be combined into total horizontal and total vertical reflections.

I like to look at the individual components of the Early Reflections curve, because I like to know which parts are influencing it. For example,many speakers show a crossover dip in the early reflections curve. I like to see how much of that dip is because of the horizontal data and how much of it is vertical, since we know the horizontal data has a bigger influence on our perception of imaging/soundstage.

If you combine the horizontal averages to get 'Total Horizontal reflections,' I feel this is the most useful individual curve for describing soundstage performance. You could also calculate the difference between this and REW to get a 'horizontal DI' curve. This is not a part of CTA-2034A, but I like calculating it for my own analyses.

You can of course also gather this from the polar maps, but I personally prefer to work with SPL charts.

With the latest update to vituixcad, you can both view and export the full component curves for early reflections.

Last edited by napilopez; 29th May 2020 at 07:50 PM.
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Old 29th May 2020, 08:20 PM   #2112
Stankor is offline Stankor  Russian Federation
diyAudio Member
 
Join Date: Dec 2018
Quote:
Originally Posted by napilopez View Post
Hi Stankor. VituixCAD is able to automatically calculate the 'Early Reflections' curve from CTA-2034A or 'Spinorama' standard. But the Early Reflections Curve itself is made up of five averages:

Front: Horizontal Average of 0, +/- 10,20,30 degrees
Side: +- 40, 50, 60, 70, 80
Rear: 180, +/- 90, 100, 110...170
Ceiling: Vertical +40,50,60
Floor: Vertical - 20, 30, 40

These curves can further be combined into total horizontal and total vertical reflections.

I like to look at the individual components of the Early Reflections curve, because I like to know which parts are influencing it. For example,many speakers show a crossover dip in the early reflections curve. I like to see how much of that dip is because of the horizontal data and how much of it is vertical, since we know the horizontal data has a bigger influence on our perception of imaging/soundstage.

If you combine the horizontal averages to get 'Total Horizontal reflections,' I feel this is the most useful individual curve for describing soundstage performance. You could also calculate the difference between this and REW to get a 'horizontal DI' curve. This is not a part of CTA-2034A, but I like calculating it for my own analyses.

You can of course also gather this from the polar maps, but I personally prefer to work with SPL charts.

With the latest update to vituixcad, you can both view and export the full component curves for early reflections.
***Wow! Intuitively, I understand what you are talking about, but I donít know at all how to do it! Take me as a student for a while. I want to make use of it! What do I need to do first?
Thank!
Oleg
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