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Author Topic: USB to PC chassis ground ? (noise) - The biggest change ever !  (Read 261142 times)
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AlainGr
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« Reply #210 on: January 28, 2014, 01:28:47 pm »

By the way, when you still mention the "power supply", even if all works fine since I disconnected (and isolated) the black wire, you are not talking about the 2 toroidal power supplies right ? This shows my total lack of knowledge about electronics...

As far as I understand it should be this wire (coming from USB ground) and not the mains ground you might refer too.

See picture.

Peter, correct me if I am wrong!
Thanks Bert for the picture... I forgot it when I came back yesterday... Yes, this is the wire I detached and isolated Happy

Alain
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« Reply #211 on: January 28, 2014, 01:34:03 pm »

My USB-cable only has D+, D- wires and separate ground wire (no 5V wire). The ground wire can easily be disconnected.

What influence could disconnecting the ground wire have? I haven’t dared to try it (Ok, this also shows my lack of proper knowledge about electronics  blush1)

Regards,
Stanley

Hi Stanley,

Since Peter has this project, I would say that we're all in the "same boat" and while Peter is the Captain, we are the sailors Happy

Regards,

Alain
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« Reply #212 on: January 28, 2014, 01:41:33 pm »

Peter,

As always, I arrive late, but I also remarked (I am with W8) that there is more weight on the right side. It is obvious. I played a little with the balance (preamp) but it does not completely correct this.

I have another observation, but it is not really related to the isolation from ground... For a while now, I need to increase the volume to get a nice level ? I don't recall having to increase gain like this with W7, but I have not used W7 for many months now...

Alain
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« Reply #213 on: January 28, 2014, 01:47:12 pm »

Peter,
While mentioning 'sleeves' you actually wanted to say 'slot openings' on the right side and that wire is put through one of slots?
(Red circled area from /your above/ photo)

Jajajajajaja Happy
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« Reply #214 on: January 28, 2014, 01:57:01 pm »

Ok sound quality changes.

Thanks a lot Coen.

Strange remark perhaps :
From the three people in here of whom I think they are able to judge sound (elements !) similar as I do/can, now all three described the same. This makes it a virtual 100% though the data is a bit on the lean side. Wink
Especially when thinking that one of the three is me. Haha.

That it is especially the bass which draws to a (right) side is interesting and another matter; I'd say that for the bass it would be the most difficult (compared to highs) and it makes me think it is the proof of jitter influence (always the most easily heard in the bass); what would be new to me is reasoning how jitter influences one side more than the other (I'm only saying that I never needed to reason over this subject) ...

Regards,
Peter
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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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AlainGr
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« Reply #215 on: January 28, 2014, 01:59:59 pm »

Peter, when changing something like isolating the ground from USB... I know what I am to say is not based on anything scientific, but could it be that when the noise patterns change, the filtering changes in some way and is able to extract more details - IOW, a detail that is buried in noise will be emphasized ?

Sorry if it is kind of "childish" and badly described...

Alain
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« Reply #216 on: January 28, 2014, 02:07:20 pm »

I notice that in your sig you "keep Kan - not persist"... Don't tell me that you have seen people from Star Trek Wink

Google for "Khan (Start Trek" - it will be clearer...
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« Reply #217 on: January 28, 2014, 03:09:00 pm »

Adjusted Alain. Thank you.
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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 #218 on: January 28, 2014, 03:15:56 pm »

Peter, when changing something like isolating the ground from USB... I know what I am to say is not based on anything scientific, but could it be that when the noise patterns change, the filtering changes in some way and is able to extract more details - IOW, a detail that is buried in noise will be emphasized ?

Alain, no clue yet. Really. However, we must keep the base idea in mind here :
What I've seen is that the usage of USB changes the DC Offset on the mains and it goes via PE (Protective Earth, not saying that nothing will happen when PE is not in order). Now, DC Offset will always be on the mains (the more apparatus you use the more) so it shouldn't be really that. However, the way USB is used should imply a frequency on the mains; the same as the general DC Offset but now looked at from how it springs (current spikes).
What I do not know is how that will creap into precious D/A chips or clocks in front of it - if at all. But somethings *has* to happen in these directions because it is totally audible.

Maybe you are right somewhere, but it needs to go over the mains first, just because that was my whole idea about it (and now I feel I must have been right haha).

Stupidly difficult ...
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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.
Removed Switching Supplies from everywhere.

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« Reply #219 on: January 28, 2014, 03:37:06 pm »

Totally  OffTopic

Google for "Khan (Start Trek" - it will be clearer...

"Khan is depicted as a North Indian Sikh—"Khan" is a title; his parents are from Chandigarh, Punjab, India..."

Marla McGivers: "From the northern India area, I'd guess. Probably a Sikh. They were the most fantastic warriors."

My parents were (when they were alive) Sikh. And I have to say that Khan is the weirdest Sikh I've ever seen.

Back to USB to PC chassis ground...

Mani.
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« Reply #220 on: January 28, 2014, 04:03:30 pm »

And there is the matter of the right channel tilt. This is less noticeable in the midrange, but bass heavy instruments are constantly more to the right.

PS: Not disputing what you hear, but bass instruments usually ARE placed to the right. (Of course there are many exceptions, depending also on the genre). 


* Bass to the right.jpg (59.04 KB, 490x400 - viewed 879 times.)
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« Reply #221 on: January 28, 2014, 06:27:39 pm »

In my system with W8 and with both sides of the USB disconnected the position of the sound image is exactly the same as with both sides not insulated. SQ similar in both cases.

Juan
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
PeterSt
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« Reply #222 on: January 28, 2014, 07:14:54 pm »

Juan,

But without isolation (PC side) there is more hum ?
At least that's what I recall you saying ...

Regards,
Peter
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For the Stealth III LPS PC :
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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« Reply #223 on: January 28, 2014, 08:57:19 pm »

Juan,

But without isolation (PC side) there is more hum ?
At least that's what I recall you saying ...

Regards,
Peter
The contrary Happy
http://www.phasure.com/index.php?topic=2838.msg29816#msg29816
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Desktop with ASUS Sabertooth X79 motherboard,Intel 3930k 6 cores (+ 6) at 1.2 GHZ,32GB ram 1333Mhz,Win 10 pro build 14386 64 bit with no updates,OS + XXHE on external Sata III SSD (Esata), music (WAV) on external 5200 rpm drive through network, OS MInimized, XX with engine 4 adaptive,4096 (buffer size), CPU with scheme 3,Player = Low,Thread = RealTime, Q1 = 14,Q345 = 1,1,1,Q1x=1,Clock res = (variable),Stop Desktop Services,Stop Remaining Services,Stop Wasapi,,LAN on,persist = on,all OSD off,SFS = 2,PE off,PA off, Arc Prediction,x16 Upsample, Straight Contiguous,Lush USB  cable,Phasure NOS1a DAC,Meitner PA-6 preamp, Spectral Audio DMA-180  Power Amp, Tannoy System 15 DMT II, Tannoy St-100 supertweeters, Tannoy TS2.12 subwoofers (2). * On hiatus for a while...
juanpmar
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« Reply #224 on: January 28, 2014, 10:25:53 pm »

Juan,

But without isolation (PC side) there is more hum ?
At least that's what I recall you saying ...

Regards,
Peter
The contrary Happy
http://www.phasure.com/index.php?topic=2838.msg29816#msg29816

Thanks Alain,

Peter, I´d say that with both sides isolated there is a similar hum as when both sides are non isolated. So, more hum than when only the card is isolated.

Now I have a different problem, lately I´ve been using the NOS1 RCA outputs but today I wanted to test some XLR cables and when I plugged the cables in the XLR NOS1 inputs the meters were reading 0.00mv. This happens with both sides isolated and it was n´t happening in the other cases, with only the card isolated or with none of them isolated.

Regards,
Juan
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
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