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 71 
 on: July 28, 2014, 05:43:24 pm 
Started by manisandher - Last post by KnB
Juan, will let you know if I can hear any improvement with the 2 meter rca over the 5 meter xlr.

I am planning to get new power cords with tailored length, so check your mailbox Happy

 72 
 on: July 28, 2014, 03:51:19 pm 
Started by manisandher - Last post by juanpmar
Hey, it's been quiet around here for a while. So I thought I'd give an update on my interconnects...

...What can I say? The sound is great with the 10m ICs I bought through Juan. I mean, really, really great. If I was being really critical, I'd say there might be a very slight loss in dynamics compared to the 2m RCA ICs I was using before, but quite frankly any such loss (if indeed it is really there at all) is nothing compared to the differences between various recordings. And furthermore, there seems to be no attenuation of the HF at all (that I can hear, at least).

So for now, I'll continue using the 10m XLR ICs. They really shouldn't sound this good considering the non-balanced nature of the setup. But they do, and that's totally fine by me.

Mani.

Hi Mani,

Im glad that you get such a good sound in your Orelo with the 47pF cable. Let me say that we also make this cable but with RCA/RCA, it has the same structure than the XLR/XLR but without the ground wire. Kjell got one of this 47pF RCA cables so he could tell us how it compares with the XLR he also has and if he finds any difference. (Kjell, we know you're away from home and we are as anxious as you to see how your new Orelo sounds after the break-in time  Wink )

Btw, we are making also a power cord that I think could be of interest for systems with auto amplified speakers like the Orelo (of course also for other systems). It has only one plug to the wall and up to four IEC connectors with all the connections in star (all components are powered and grounded from a single common point). This cable lets connect, in practice, all the components directly to the wall in one shot while preserving a path 100% shielded.
The power distributors or power bars are useful for their flexibility, but typically have two problems, unnecessarily multiply contacts (IEC inlet, inside wiring, connection sockets, new connectors on cables associated input and output, etc.), and often wiring are not in star, so the ground potential is not the same between the connections, resulting in ground noise that generally affect more or less the sound. This cable avoids these problems.

Just a humble contribution to get everything a bit better. If anyone is interested please PM as I have no website. It is pure craftsmanship at very affordable price  Happy

Kind regards,
Juan

 73 
 on: July 28, 2014, 01:52:19 pm 
Started by PeterSt - Last post by PeterSt
Hi there Ulli,

SPDIF/EAS can just "transport" 32 bits all right.
So what I recall further (but this is a LONG time ago !) is that the internal processing of the DEQX relies on the received bit depth. And, as I can derive from my original post, when you'd use a CD player for source (or any software player for that matter) which outputs in 16 bits, the DEQX will process with 16 bits as well. Not the best ...

But please notice, this is from such a long time ago that I can imagine that the modern DEQX works all differently.
But of course you can easily try : just use a software player that outputs in 32 bits and compare with one that outputs in 16 bits.

I hope this helps and best regards,
Peter

 74 
 on: July 28, 2014, 01:33:22 pm 
Started by manisandher - Last post by manisandher
Hey, it's been quiet around here for a while. So I thought I'd give an update on my interconnects.

I can't even remember in which thread I mentioned that I'd be comparing a bunch of ICs, having been told by Peter that my 10m ICs just wouldn't 'work' seeing as the XLR inputs of the Orelos are not balanced. Well, my comparison hasn't really panned out the way I was hoping. Before I left for a business trip last week, I asked for a pair of 'expensive' 2m RCA ICs to be given to me on loan to try out. Well they haven't arrived (not sure they ever will) and because my listening room was in such a mess (from trying the USB cable comparisons), I decided to just put the PC back in the basement, and the NOS1a in the basement 'studio' for now.

What can I say? The sound is great with the 10m ICs I bought through Juan. I mean, really, really great. If I was being really critical, I'd say there might be a very slight loss in dynamics compared to the 2m RCA ICs I was using before, but quite frankly any such loss (if indeed it is really there at all) is nothing compared to the differences between various recordings. And furthermore, there seems to be no attenuation of the HF at all (that I can hear, at least).

I'm not sure this will be a permanent set up. At some point, I think I need to try the PC in the basement and the NOS1a in the main room, with a 5m USB cable between them and 2m ICs to the Orelos. But this will require pulling up some floorboards again, something that I thought I'd never need to do again. Not a big deal, but crawling under the floors of a 130-year-old house isn't my idea of fun.

So for now, I'll continue using the 10m XLR ICs. They really shouldn't sound this good considering the non-balanced nature of the setup. But they do, and that's totally fine by me.

Mani.

 75 
 on: July 28, 2014, 12:31:48 am 
Started by PeterSt - Last post by modmix
Hi Peter,

I use a DEQX since quite a while (sources so far: various sw player, media player and sat-receiver; all connected via AES/EBU through 10 MHz sync-ed MC-3+ re-clocker - quite happy with that ,-)

I just discovered these page while looking around for some information related to perceived SQ differences.

Now please keep in mind that when you set XXHighEnd to "DAC needs" to 32 bits and you feed that DigIn to the DEQX, it will apply internal 32 bit processing.
Would you pls kindly explain this a bit more?
DEQX digitally receives SPDIF or AES/EBU, only. Both signals may carry up to 24 bit per sample, as far as I know.

Thank you in advance
Ulli

As a side remark: A/D conversion inside DEQX uses an internal oscillator with some limited spec - SQ has been improved by a friend by changing this device.

 76 
 on: July 27, 2014, 09:57:43 pm 
Started by charliemb - Last post by PeterSt
All right. By now I may think differently again and that even Hires should be filtered in the "non-AP way". So no worries.

Also : Because at this moment you can only use the 176.4 filter while using 352.8 this will ring unnecessarily.
Nothing wrong with your ears !

Peter

 77 
 on: July 27, 2014, 09:40:48 pm 
Started by charliemb - Last post by charliemb
Notice that a digital filter has two purposes :
1. Reconstruction (really only applicable to 44.1/48);
2. Bringing down high frequency "noise" (same signal but images beyond Nyquist (sampling rate / 2)).

What Arc prediction will do regarding Hires is #2 only. Oh, it will work on #1 as well, but this is quite moot because not needed unless we think that frequencies between 22.05 and 44.1 (for 88.2 sampling rate) are very audibe and need reconstruction too.
So what's left for the Custom Filter is bringing down the HF "noise" more but to a degree which is rather moot (because Arc Prediction at 705.6 (768) output already has it down sufficiently to be harmful (beyond 352.8 (384)).

So it's almost the other way around : When the Custom Filter is engaged by standard (for say 705.6 and anticipating 44.1/48 playback) it should not engage the filtering itself when Hires is in order and leave Arc Prediction as it is.

All again will be different when Arc Prediction is shut off in the first place (see grayed checkbox in the Filter Designer) and now *only* the Custom Filter is operative. But here too, you won't be able to make it yourself because it needs to show the results of it (though this I could graph) and now I also don't feel much like making such a filter for you guys because I just don't see the reason (for the better) for it.

Let me clarify what I understood because I think things are different at 352/384 than they are at 705/768 and I think that even hi res needs help.  I understood that you might make a custom filter that behaves like AP when the source is hi.res. and like Custom (how it is now) when sourced with 44/48. 

What I'm saying is that even with hiRes source material, at 352/384 my ear is much preferring Custom over AP.  Hard to argue with the ear.

As an aside, I now hear the buzzing / zooming / mosquito-ing of the typical upsamplers that you've talked about.  I also hear that AP never has it, nor do the interpolative filters in HQPlayer.  With Custom, I can *sometimes* hear a little hint of the buzzing.  I accept it as it comes with a bunch of other goodies.  But usually when I hear it with Custom, it is in the recording itself; and I presume this is from the EQ processors that audio engineers use for vocals.  No doubt they ring, some more than others.   And I can check with AP for those recordings and sure enough the ringing is there for those recordings.  It's not a clean ring when it is in the recording but the essence is surely there.

Anyway, I hear the trade off that you are making with these filters and can see that it is like walking a tight rope, picking the right balance between the two extremes.

I can say, it is amazing that Custom measures better than AP because AP sounds cleaner.  But sound is sound.

 78 
 on: July 27, 2014, 09:30:00 am 
Started by charliemb - Last post by PeterSt
Quote
for say 705.6

Charlie, the "say" was meant to be an example. But I also think that maybe you didn't get what I meant. So for 352.8 and the others it would count the same (don't engage that filtering). Tell me if it is not clear.
Peter

 79 
 on: July 26, 2014, 10:35:10 pm 
Started by charliemb - Last post by charliemb
So it's almost the other way around : When the Custom Filter is engaged by standard (for say 705.6 and anticipating 44.1/48 playback) it should not engage the filtering itself when Hires is in order and leave Arc Prediction as it is.

I think that this is true for 705K.  But don't forget us peons who can only go to 384K!  prankster

 80 
 on: July 26, 2014, 09:57:10 pm 
Started by vrao - Last post by vrao
Lol ..... If you look at it that way ... prankster

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