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Author Topic: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )  (Read 3187 times)

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bixby

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #40 on: September 23, 2015, 05:59:21 AM »
That agrees with my logic as well, I was just wondering what people might be hearing.  Cheers
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Solderdude

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #41 on: September 23, 2015, 06:40:25 AM »
Quote from: bixby on September 23, 2015, 05:59:21 AM
That agrees with my logic as well, I was just wondering what people might be hearing.  Cheers

The theory is that the problem is not in the data file (ie bits and bytes) but rather in the timing of the (recovered) clock signal.

There are several theories explaining how 'jitter' could be induced in all kinds of ways which basically is a timing issue.
It is believed that much smaller amounts of jitter are audible than established through 'tests' done in the past.

As far as I can see even the USB input of the Yggy (which is exemplary in jitter rejection !) can still improve audibly using miracle devices (acc to some) while it is already at an incredibly low 2.7ps p-p and an inaudibly low -150dB.
audible 'improvements' have not been backed up with any plots. This cannot be done with a simple sound card anyway.

Personally I am DAC-deaf (unless the FR differences reach audible thresholds) so, fortunately for me, I can't hear jitter in any of my DAC's. Maybe because I don't know what to listen for.





« Last Edit: September 23, 2015, 12:19:34 PM by Solderdude »
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Use your ears to enjoy music, not as an analyser.

OJneg

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #42 on: September 23, 2015, 07:00:03 AM »
Quote from: Solderdude on September 23, 2015, 06:40:25 AM
2.7ps p-p

How'd you arrive at that figure?
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Solderdude

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #43 on: September 23, 2015, 10:16:30 AM »
Atomicbob's measurement...

see the pop-up box on the left.

« Last Edit: September 23, 2015, 04:16:12 PM by Anaxilus »
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DaveBSC

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #44 on: September 23, 2015, 04:10:41 PM »
Quote from: bixby on September 22, 2015, 06:08:28 PM
Unless your player does not load an entire playlist.  What about any power or ground plane noise traveling along the USB ground to the computer, would that go away while the drive sleeps?

Some of the JPlay guys have Adnaco cards for their ext USB hard drives with their music on them. No direct ground path.
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DaveBSC

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #45 on: September 23, 2015, 04:16:46 PM »
Quote from: Thad E Ginathom on September 22, 2015, 06:14:38 PM
Never been sure that is an ideal. Yes, if you get interruptions while the data is sent for from the hard disk, but, no interruptions, no need. But hey, audiophilia.

Consider how much slower an optical drive is than an HDD, and yet, PCs do actually, although we don't often admit it (or even actually need it) play music from their CD drives, just fine.

It has nothing to do with interruptions. When you start getting into the deep end of the pool in terms of optimizing a standard PC for audio, the idea is that having HDD I/O during playback is a source of noise, so all music in RAM, less I/O, less noise. That's part of the goal behind JPlay's hibernate mode. Once enabled, all HDD I/O stops, not just the music files, but everything. You can physically disconnect the system drive, and playback will continue.

I don't care to take things that far. VortexBox is good enough for me.
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Thad E Ginathom

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #46 on: September 23, 2015, 04:45:43 PM »
I think that there are two possibilities: one is, as you say, something else electrical going on is a source of noise. Some people say that. The other is to do with interrupts, where buffers do not get filled because the machine is doing something else. Hearing the mouse pointer move across the screen, as the system prioritizes video over audio is not nice, and it is noise. DPC latency, if the course is not easily traceable, is an audio nightmare, It's the reason my last PC was thrown out. On a par with a flickering fluorescent light!

Although I love to rant about Windows, my initial forays into Linux audio absolutely needed a rt kernel for un-[literally]-interrupted playback with the interfaces I was using. Then the Low-Latency kernel would do. Now I'm running a generic kernel and there is never a drop out, unless I forget to fix the CPU speed adjusting thingy.
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Judeus

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #47 on: September 25, 2015, 05:43:03 AM »
just curious, any early thoughts on the wyrd vs regen anax?
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ohhgourami

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #48 on: September 26, 2015, 12:09:45 AM »
Looks like this isn't happening then...
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Yuanathan

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Re: PCI card teaser for DIGITAL output ONLY! ( Lynx E22 v. JCAT v. Regen v. Wyrd )
« Reply #49 on: September 26, 2015, 04:32:11 AM »
Echoing Solderdude comment above, looking at the exceptionally good measurements of GMB and Yggy from Atomicbob, it really makes me wonder how does all the jitter rejection/improvement devices work to improve these dac? Anyway all these does is to pique my interest of Anax's comparison.  popcorn  popcorn

Deep down of course I hope for all these to be placebo, even with money back guarantee of some of these tweaks, the return shipping to OEM from Asia to USA/Europe alone makes me  :-[  :-[
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