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Author Topic: PS/2 Keyboard with trackball for hopefully best SQ  (Read 140 times)
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charliemb
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« on: July 10, 2019, 11:26:13 pm »

Hi Everyone - For anyone still using a keyboard and mouse or trackball....

I wanted to share my experience and the PS/2 keyboard and mouse combo that I ordered to avoid using USB connections for keyboard and mouse/trackball.  Thanks to Mani for suggesting a similar keyboard, the 515, in the XXHighEnd PC thread.  This one is the 505, at US $30.  From Newegg, still available in the US at least:
Perixx PERIBOARD-505U PLUS Wired Mini USB Keyboard with Trackball - 315x147x26mm - 14mm Trackball
https://www.newegg.com/perixx-pb-505upus-11096-usb-wired/p/0GA-0038-00097?Item=9SIA2J29A02156

I also ordered two 15 ft PS/2 extension cables to connect the 505 keyboard/trackball to the music server.  My version of the XXHighEnd PC has two PS/2 ports.  I plan to twist the two extension cables to make one snake.  This might seem kludgy but read below for why this might be worth the effort.

Background
Peter has suggested that USB connections for keyboard/mouse were not the best.  I had previously tried a PS/2 to USB Keyboard adapter to to connect through the PS/2 ports but that didn't work.  After much procrastination, years, only now have I got around to this SQ tweak again. 

Last night it hit me (after suggestions made here) that I could partly test this by disconnecting my USB wireless dongle from my PC after playback started, and then plugging it in again after the album completes.  Clearly this sounded better, but resulted in some skipping after a little listening.  Next I removed the battery on my wireless keyboard/trackpad instead of unplugging and plugging and this worked (then I realized the wireless keyboard had an On/Off switch and started using that).  Unquestionably, this provided a better sound quality.  So today I ordered the above keyboard with trackball.

I'm confident that this will work out for the better.  Please assume so unless I'll post otherwise.  I imagine that it should sound even better than removing power from the wireless keyboard because last night's experiment still had a USB dongle attached during playpack.  When the new keyboard arrives next week, I will unplug the dongle and only the USB DAC will be the sole USB connection in my system.  Further, I will also uninstall the PCI-e USB card to which it was attached (solely).  (I figured that since my wireless keyboard was on its own separate PCI-e to USB adapter card that it might not affect SQ as much as connecting it to the MB.  Sonics say it still matters, at least on an XXHighEnd PC.)

Happy listening
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April 2019:
XXHighEnd PC (i7 3930K) Hyperthreading On (12 cores) clocked to 3.8GHz, 16GB, Windows 7 Ultimate64 SP1 on 2.5” SATA2 SSD disk for OS and XX, music on 3.5” SATA3 7200 RPM.  Motherboard BIOS settings: BCLK = 100 MHz / Intel Speed Step = OFF / Max Clock Ratio = 38 / Allow OS to change ratio = OFF. 
XXHighEnd 2.10 Adaptive / Q1/3/4/5 = 2/0/0/1 / Q1x = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Straight Contiguous / SFS = 30 (max 150) / Playerprio = Low (or below normal) / ThreadPrio = High / Core3-5 / No Playback Drive / No RAMDISK (the built-in one, have not tried IMdisk) / UnAttended / most services Off, WASAPI on  / Minimize OS / XTweaks set to v2.01 Defaults / 8x 384 Custom Filters (High)
DAC: Holo Audio Spring 2 KTE NOS DAC, and no preamp
numlog
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« Reply #1 on: July 12, 2019, 05:41:03 am »

Thanks for the report.

I also wanted to give this a try sooner but most MoBos only have 1 PS2 port now, or do they?
The MoBos all seem to have a 2 tone, green and purple socket. This implies dual support, the IO guard has both symbols side by side too with no ''/''...

PS/2 splitters do exist, the PS/2 connection has 2 N/C pins which could easily carry the extra CLK and DATA signals, but any discussion or info on the single ports supporting split signals is scarce.
Im not using USB now for the DAC so the only thing keeping me from disabling all USB ports is KB+M... I will have to get some PS/2 devices and see if this works
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PC: Ryzen 1700(Nofan), 2133MHz 2x4GB, GPU, Gigabyte A320
OS drive: Optane 16GB M.2, OS: S2019 Core,
PCIe SATA card+ USB3.1 card (w/ LPS, SiTime TCXO), Corsair Rm650x PSU.
PeterSt
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« Reply #2 on: July 14, 2019, 01:16:01 pm »


Thank you for that, Charlie.

Indeed, not many MoBo's have two PS2 sockets. If at all, these days.

But question : Why use a keyboard at all when you can use RDC (wired) from the same PC the music resides ? I am pretty sure that by far most do it like that and they disconnect everything from the audio playing PC. I do that too. No keyboard, no mouse, no monitor connected. And indeed that improves SQ a lot ...

Peter
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For the Stealth III LPS PC :
W10-14393.0 - Oct 31, 2018 (2.10)
XXHighEnd Mach III Stealth LPS PC -> Xeon Scalable 14/28 core with Hyperthreading On (set to 10/20 cores) @~660MHz, 48GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 30/-/1/1/1/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 15ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 140.19  (max 140.19) / 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 = 35 / Nervous Rate = 10 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / *Arc Prediction Filtering (16x)* / Always Clear Proxy before Playback = On -> USB3 from MoBo -> Lush^2*A:B-W-Y-R, B:B-W-R* 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 A:B-R, B:B-R* Interlink -> Orelo MKII Active Open Baffle Horn Speakers.
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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