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Author Topic: Burst of white noise  (Read 5259 times)
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manisandher
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« on: May 14, 2014, 09:02:05 pm »

Since I switched to a low SFS (0.5), a low clock res (min for system) and a lowish buffer in the NOS1 control panel (4ms I think, but I can't check right now) I've had a burst of white noise coming through my speakers on two separate occasions.

On each occasion, this happened immediately after a certain sequence of events. Firstly, I loaded and started playing some tracks. Within the first couple of seconds of playback, I pressed Alt-X and stopped the playback for some reason (wrong album, etc). When I then pressed play again, I received the burst of white noise through the speakers. On both occasions, the internal fuses of my mono amps blew.

The speakers I'm currently using are very low efficiency, so I usually have XX's vol set to between -12 and 0. So the white noise might have potentially been at full scale.

In all the time of using XX without a preamp, something like this has NEVER happened before. I'm convinced it has something to do with my changed settings. In any event, when I get my NOS1 back from its NOS1a upgrade, I will definitely not be using these settings.

Any ideas?

Mani.
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Main System:
Phasure Mach III (Win 14393.0 on RAM-OS / controlled by RDC, / connected directly to music server / XXHighEnd 2.11 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=10 / xQ1=15 / Q3,4,5=1 / SFS=4.00 / XTweaks = 34, 10, 0, 0, 0 / Straight Contiguous / Clock Resolution = 15ms / Scheme 3-5 (low/realtime) / 8x Arc Prediction / switch #5 'up/off' / Unattended) mobo USB3 port -> Lush^3 -> Phasure NOS1a B75 G3 -> 8m Blaxius^2 -> First Watt F5 mono amps -> Tune Audio Anima horn speakers
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« Reply #1 on: May 14, 2014, 09:54:46 pm »

I've had the burst of white noise also.  It happens to me when I have to many "alt"  commands in a row without waiting for the computer to respond.  Once,  I was quickly trying to lower the volume in unattended using the "alt d" command so I could talk to my 5 year old daughter when the white noise hit us.  I think we both had a slight heart attack.

Now I move very slowly when I hit "alt u, d" and I haven't had any issues.

David
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PeterSt
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« Reply #2 on: May 15, 2014, 07:53:06 am »

Mani,

I would dedicate this to a very coincidental happening with the sound engine stopping and restarting. Not that I would now how to mimic that but possibly you can bring it in a stop-start state it does not like (and notice this is all a-synchronous processes living by external commands).

How the fuses of your amps would blow by this is beyond me. Oscillation because of very high frequency signal ?
Notice that white noise is not that, but what you name white noise probably is "static" (the virtual window blowing type) and that is the most HF (wrong byte order).

Peter


PS: I myself received static only last week. This was the first time in 3-4 years or so. I must be lucky because *I* am always attempting limits, do (programmatically) things wrong etc., so it must be have been pretty safe(ly built) in there (by myself).

PPS: SFS of 0.5 is not low these days. 0.05 is. And I see nothing wrong with your settings anyway.
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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).
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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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