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Author Topic: 0.9u-5 - what's happened to the imaging when upsampling?  (Read 31111 times)
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manisandher
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« on: March 09, 2008, 09:52:12 pm »

Has anyone else noticed the drastic contracting of the soundstage when upsampling either to double or quad, or is it just me?

Mani.
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« Reply #1 on: March 09, 2008, 10:00:08 pm »

No, that is not my experience. It seems a bit softer though. I think I like it better. But more listening has to be done. I can live with that:)
Leo
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« Reply #2 on: March 09, 2008, 10:02:33 pm »

Persnonally I don't like it at all. But then I can only listen to Quad via the Fireface as the DAC. And that's not really it. nea
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manisandher
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« Reply #3 on: March 09, 2008, 10:10:49 pm »

I'm with you Peter - I don't like it. (Actually, my strong preference is 'DAC is 16 bits 44.1 KHz' when I'm not listening to 24 bit files.)

Using my headphones, the stereo imaging has definitely contracted.

I agree Leo, it's softer... but lost the transient edge IMO.

Mani.

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« Reply #4 on: March 09, 2008, 10:28:29 pm »

Mani, I assume that you don't mean that things changed for the worse since 0.9u-4 ? (for Doubling of course)
If you do mean that, then something else is going on, because such a change is not intentional.

Btw, don't forget to set the buffer of the soundcard accordingly (like in your case the Fireface);
For Double it needs 96 samples, and for Quad 128 (native can deal with 32 when your driver allows).

Also, when you (all) can listen to it through the same DAC (hence capable of 176400), give it some (tweak) time; Just as you needed experience with 44.1 or doubled to 88.2 for that matter, this needs that experience just the same, and the settings (like Q1) probably won't be the same.

Keep in mind that a DAC always performes worse on a higher sample rate than on the lower.
But then also try to imagine that the increased (though calculated) resolution works for movies, and therefore it should work for audio as well. Sadly so many parameters are in effect with audio (like the larger buffer needed, which destroys by itself).

And yes Mani, I still have to look into the aliasing. Happy
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A: W-Y-R-G, B: *W-G* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> Blaxius*^2.5* A:B-G, B:B-G Interlink -> Orelo MKII Active Open Baffle Horn Speakers. ET^2 Ethernet from Mach III to Music Server PC (RDC Control).
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For a general PC :
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manisandher
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« Reply #5 on: March 09, 2008, 10:53:59 pm »

No, things haven't changed for the worse. I preferred no upsampling then and now.

Have a look at these two images on the RME Vector Audio Scope. Guess which one is quad upsampled...

Mani.


* 15KHz normal.jpg (44.23 KB, 449x566 - viewed 806 times.)

* 15KHz Quad Upsampled.jpg (52.07 KB, 453x568 - viewed 844 times.)
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« Reply #6 on: March 09, 2008, 10:58:02 pm »

Wow. But I guess it's the one which says SR 176.4 KHz and is called Quad Upsampled.jpg. grazy

Uhhm ... does Double/Upsampled looks so as well ?
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A: W-Y-R-G, B: *W-G* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> Blaxius*^2.5* A:B-G, B:B-G Interlink -> Orelo MKII Active Open Baffle Horn Speakers. ET^2 Ethernet from Mach III to Music Server PC (RDC Control).
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
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manisandher
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« Reply #7 on: March 09, 2008, 11:01:50 pm »

Yes, I realised the files names as I pressed post.

Here's another pretty picture...

Mani.


* 15KHz Double Upsampled.jpg (51.47 KB, 447x563 - viewed 873 times.)
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« Reply #8 on: March 09, 2008, 11:04:27 pm »

Actually, my P70 transport is also capable of double and quad upsampling. But it's part of my other system. If I have time, I'll connect it's dig output to the RME and see what happens.

Mani.
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« Reply #9 on: March 09, 2008, 11:20:58 pm »

If your last pisture is, say, stable, then sure something is wrong there.
I'll dive into that this week. Something else for a change.
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XXHighEnd Mach III Stealth LPS PC -> Xeon Scalable 14/28 core with Hyperthreading On (set to 14/28 cores in BIOS and set to 10/20 cores via Boot Menu) @~660MHz, 48GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/0/*1*/ Q1Factor = *4* / Dev.Buffer = 4096 / ClockRes = *10ms* / Memory = Straight Contiguous / Include Garbage Collect / SFS = *10.13*  (max 10.13) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / OSD Off (!) / Running Time Off / Minimize OS / XTweaks : Balanced Load = *62* / Nervous Rate = *1* / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / Custom Filtering *Low* (16x) / Always Clear Proxy before Playback = On -> USB3 from MoBo -> Lush^3
A: W-Y-R-G, B: *W-G* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> Blaxius*^2.5* A:B-G, B:B-G Interlink -> Orelo MKII Active Open Baffle Horn Speakers. ET^2 Ethernet from Mach III to Music Server PC (RDC Control).
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
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« Reply #10 on: March 10, 2008, 12:19:10 am »

Hahaha, not good. A clear case of program(er) error.
The Double-Upsampling part contains an error somewhere. The used bith depth can be the other way around just the same.
Smart ... swoon


* Double01.png (13.45 KB, 590x181 - viewed 836 times.)
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W10-14393.0 - July 17, 2021 (2.11)
XXHighEnd Mach III Stealth LPS PC -> Xeon Scalable 14/28 core with Hyperthreading On (set to 14/28 cores in BIOS and set to 10/20 cores via Boot Menu) @~660MHz, 48GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/0/*1*/ Q1Factor = *4* / Dev.Buffer = 4096 / ClockRes = *10ms* / Memory = Straight Contiguous / Include Garbage Collect / SFS = *10.13*  (max 10.13) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / OSD Off (!) / Running Time Off / Minimize OS / XTweaks : Balanced Load = *62* / Nervous Rate = *1* / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / Custom Filtering *Low* (16x) / Always Clear Proxy before Playback = On -> USB3 from MoBo -> Lush^3
A: W-Y-R-G, B: *W-G* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> Blaxius*^2.5* A:B-G, B:B-G Interlink -> Orelo MKII Active Open Baffle Horn Speakers. ET^2 Ethernet from Mach III to Music Server PC (RDC Control).
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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Leo
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« Reply #11 on: March 10, 2008, 10:05:40 am »

Very nice graphics Mani, but what do they represent ? 

Leo

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In highschool days  my father gave me an old copy of the book "How to lie with statistics". Very usefull it turned out to be..
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« Reply #12 on: March 10, 2008, 10:30:54 am »

Leo, they're not just pretty pictures. These things are taken very seriously in broadcast studios and in the post-pro and mastering field.

A Vector Audio Spectrum shows the level and phase differences between the left and right channel (often referred to as a Goniometer).

From the second you see the double upsampled image, you know something is wrong - it should be symmetrical when fed, as it was, a mono signal.

The quad upsampled image shows the effects of aliasing...

Hope this helps.

Mani.
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« Reply #13 on: March 10, 2008, 10:43:35 am »

Actually, thinking about it, the quad upsampled image suggested a 90 degree phase shift between left and right channels... I think.

Any other ideas anyone?

Mani.
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« Reply #14 on: March 10, 2008, 10:48:26 am »

Thanks Mani,

And will this kind of output allways be there with oversampling (if without error, like the quad) . I mean the soundlevel effect and the aliasing 'noise', Or are some oversampling algorithmes better than others employing this test.
Funny to see that the soundlevel impression is confirmed by the test.

I ask this because, this seems a very easy test for the quality of oversampling, whereas all kinds of semi-religious wars are being fought on the fora about which up-sampling method is better (software, (and then which...),  hardware, realtime or not) .

Leo
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