LIΟN
Active Member
First of all, this is my experience with BRIR. I think it's going to be the same in real life, but please note that it would be unrealistic to place the problem the same and run it as it is.
I'm enjoying BRIR, XTC and I try a lot of things in the meantime.
Not long ago, I was thinking to myself about the part of head tracking that improves reproducibility when asymmetric parts are filled and compensated for, and I wanted to do something like this.
Having an asymmetric itd is like being tilted to one side (because one side arrives first)
So I was wondering what you would hear if both sides were asymmetric (asymmetricitd arriving in each ear first).
(Why do I do this? I'm just curious.)
This is the assumption of a normal stereo state (it's taken as itd around 220~250us).
And I made an asymmetrical response as if I turned my head and body.
It's a variant of the correct symmetric itd response on a 30-degree basis, but it's roughly similar to the response when you turn your body in a 10-degree response.
So I changed the itd of 250us/250us to 63us/250us + 250us/63us, respectively.
My first thought was this.
I couldn't predict it because the way I hear that sound is unrealistic, but I thought I wouldn't hear anything more than 250us (Non-XTC)
Maybe I just thought it was going to make a weird sound.
But it wasn't a sound that had the characteristic of 250us, and it wasn't a sound that was close to 63us mono.
It was an unexpected result. And the weird thing was that it sounded very natural.
Please take into account that I didn't do the drag correctly.
You can see the main channel's response starts and the asymmetric itd that I intended to start after about 63us on the opposite channel.
And after the first itd, the second existing 250-us itd characteristic comes in.
To put it more simply
It's an asymmetric response, but we eventually see that the peaks of itd occur twice, at 63us and 250us. (The various peaks of itd play even when multiple multichannels are played simultaneously, but the important thing is that the starting point is asymmetric. The original appearance of this source is a response of 30 degrees 250us.)
You don't need to look at the main channel (for example, if it's a left speaker, the left ear) because it's the same.
If you look at the response corresponding to the opposite channel (orange), it varies a lot.
You can see a huge variation in the response at approximately 3000 Hz.
That response is fully understood. If responses from different angles, different heights, and different itds are combined, the transformation has to happen.
But what's more interesting is the combined response when we actually hear it
By the original standard, it shows the combined response of a typical 30-degree response. My response has no reflection sound, almost no initial reflection close to an anechoic chamber, and only late reflection remains. It is normally normal for the combined response in anechoic chamber to have a slight dip after 1k at that angle.
But when you combine the responses of asymmetric itd, something very interesting happens. There is also a variation in the frequency band after about 6k, but you can see that it is transformed as if the dip between 1 and 2k is filled.
If it sounds narrow, of course, that's understandable
Of course, I can understand even if it sounds 250us
Why it sounds narrow, why it sounds wider, why it sounds more natural (information outside the speaker boundaries is more natural)
Even if it's symmetrical and it's not an absolutely wide angle
If it's relatively asymmetrical, it might be perceived as broad
Does the point of feeling natural continue to accept those asymmetric elements in reality? I don't know now.
And it was more interesting when I tried it from different angles.
It is similar to a stereo at a 30-degree angle when you listen to it asymmetrically by increasing itd in a near-mono speaker arrangement with an angle of 8 degrees on both sides.
And when you listen to the ASW expansion response with an angle of 60 degrees on both sides by reducing itd to one side and adding it to asymmetric, it sounds like the response is extended to approximately 100 to 110 degrees in the rear.
When the response near the rear 110 degree for LEV purposes is reduced by itd, and is added asymmetrically, the depth of the rear becomes tremendously far and deeper.
This time, the response near the rear 110 degrees for LEV use increases itd, and when the sum is raised asymmetrically, it does not completely invade the front, but it is almost similar to the side surround, but the difference is that the sound extends to both sides at the same time
And the important thing is that the original image of each source is maintained. When the front stereo comes, the sound of the front stereo is maintained and expanded. That's the weirdest thing about it.
In fact, it was more natural than placing the speaker wide, and if you place the speaker wide, the image in the center is inevitably weak.
But it's strange that there's also no such downside.
I couldn't predict this because it sounds unreal. But the result was pretty fun.
And what I felt about these actions (various angles) was that I couldn't hold the boundaries of the speaker.
For example, when I heard it by adding asymmetric itd to an 8-degree speaker, I wrote that it was similar to a 30-degree stereo, but it feels literally similar, but it's actually different.
In Non XTC state, it is normal that the boundaries of the speaker should be felt, but it is hard to feel.
Of course, it feels a little different from the response that applied and finished XTC by repeating exactly the reverse phase of the personalized Crosstalk in the same way as Bacch.
However, it is different from the general response, and the meaning that itd is asymmetric eventually becomes similar to a situation in which one ear is less responsive, so I think it is a natural (actually unrealistic) anti-XTC state.
The writing got a bit longer, so to sum it up
Thoughts on the sound you hear (although symmetrical as a result) in the form of the asymmetrically arriving itd, where you hear one side first, as if you're turning your body around and listening. It may be related to the position and spacing of the speakers, to the perceived sense of Crosstalk. It may be that the brain is confused.
I think I'll know for sure if I try XTC later on with these asymmetric summation responses, but I've posted it.
These experiences are difficult in real life, but I was wondering if anyone has thought about them, tried them or experienced them.
Perhaps those with a lot of experience with binaural and XTC like @STC @Tim Link have experienced or thought about this.
Or leave your comments.
I'm enjoying BRIR, XTC and I try a lot of things in the meantime.
Not long ago, I was thinking to myself about the part of head tracking that improves reproducibility when asymmetric parts are filled and compensated for, and I wanted to do something like this.
Having an asymmetric itd is like being tilted to one side (because one side arrives first)
So I was wondering what you would hear if both sides were asymmetric (asymmetricitd arriving in each ear first).
(Why do I do this? I'm just curious.)
This is the assumption of a normal stereo state (it's taken as itd around 220~250us).
And I made an asymmetrical response as if I turned my head and body.
It's a variant of the correct symmetric itd response on a 30-degree basis, but it's roughly similar to the response when you turn your body in a 10-degree response.
So I changed the itd of 250us/250us to 63us/250us + 250us/63us, respectively.
My first thought was this.
I couldn't predict it because the way I hear that sound is unrealistic, but I thought I wouldn't hear anything more than 250us (Non-XTC)
Maybe I just thought it was going to make a weird sound.
But it wasn't a sound that had the characteristic of 250us, and it wasn't a sound that was close to 63us mono.
It was an unexpected result. And the weird thing was that it sounded very natural.
Please take into account that I didn't do the drag correctly.
You can see the main channel's response starts and the asymmetric itd that I intended to start after about 63us on the opposite channel.
And after the first itd, the second existing 250-us itd characteristic comes in.
To put it more simply
It's an asymmetric response, but we eventually see that the peaks of itd occur twice, at 63us and 250us. (The various peaks of itd play even when multiple multichannels are played simultaneously, but the important thing is that the starting point is asymmetric. The original appearance of this source is a response of 30 degrees 250us.)
You don't need to look at the main channel (for example, if it's a left speaker, the left ear) because it's the same.
If you look at the response corresponding to the opposite channel (orange), it varies a lot.
You can see a huge variation in the response at approximately 3000 Hz.
That response is fully understood. If responses from different angles, different heights, and different itds are combined, the transformation has to happen.
But what's more interesting is the combined response when we actually hear it
By the original standard, it shows the combined response of a typical 30-degree response. My response has no reflection sound, almost no initial reflection close to an anechoic chamber, and only late reflection remains. It is normally normal for the combined response in anechoic chamber to have a slight dip after 1k at that angle.
But when you combine the responses of asymmetric itd, something very interesting happens. There is also a variation in the frequency band after about 6k, but you can see that it is transformed as if the dip between 1 and 2k is filled.
If it sounds narrow, of course, that's understandable
Of course, I can understand even if it sounds 250us
Why it sounds narrow, why it sounds wider, why it sounds more natural (information outside the speaker boundaries is more natural)
Even if it's symmetrical and it's not an absolutely wide angle
If it's relatively asymmetrical, it might be perceived as broad
Does the point of feeling natural continue to accept those asymmetric elements in reality? I don't know now.
And it was more interesting when I tried it from different angles.
It is similar to a stereo at a 30-degree angle when you listen to it asymmetrically by increasing itd in a near-mono speaker arrangement with an angle of 8 degrees on both sides.
And when you listen to the ASW expansion response with an angle of 60 degrees on both sides by reducing itd to one side and adding it to asymmetric, it sounds like the response is extended to approximately 100 to 110 degrees in the rear.
When the response near the rear 110 degree for LEV purposes is reduced by itd, and is added asymmetrically, the depth of the rear becomes tremendously far and deeper.
This time, the response near the rear 110 degrees for LEV use increases itd, and when the sum is raised asymmetrically, it does not completely invade the front, but it is almost similar to the side surround, but the difference is that the sound extends to both sides at the same time
And the important thing is that the original image of each source is maintained. When the front stereo comes, the sound of the front stereo is maintained and expanded. That's the weirdest thing about it.
In fact, it was more natural than placing the speaker wide, and if you place the speaker wide, the image in the center is inevitably weak.
But it's strange that there's also no such downside.
I couldn't predict this because it sounds unreal. But the result was pretty fun.
And what I felt about these actions (various angles) was that I couldn't hold the boundaries of the speaker.
For example, when I heard it by adding asymmetric itd to an 8-degree speaker, I wrote that it was similar to a 30-degree stereo, but it feels literally similar, but it's actually different.
In Non XTC state, it is normal that the boundaries of the speaker should be felt, but it is hard to feel.
Of course, it feels a little different from the response that applied and finished XTC by repeating exactly the reverse phase of the personalized Crosstalk in the same way as Bacch.
However, it is different from the general response, and the meaning that itd is asymmetric eventually becomes similar to a situation in which one ear is less responsive, so I think it is a natural (actually unrealistic) anti-XTC state.
The writing got a bit longer, so to sum it up
Thoughts on the sound you hear (although symmetrical as a result) in the form of the asymmetrically arriving itd, where you hear one side first, as if you're turning your body around and listening. It may be related to the position and spacing of the speakers, to the perceived sense of Crosstalk. It may be that the brain is confused.
I think I'll know for sure if I try XTC later on with these asymmetric summation responses, but I've posted it.
These experiences are difficult in real life, but I was wondering if anyone has thought about them, tried them or experienced them.
Perhaps those with a lot of experience with binaural and XTC like @STC @Tim Link have experienced or thought about this.
Or leave your comments.
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