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Old 9th May 2013, 09:03 AM   #401
Coris is offline Coris  Norway
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Quote:
Originally Posted by jan.didden View Post
Coris, when I understand you correctly, you play the files through the Oppo's interface (presumably your TV). I don't want that, it is too limited, you can't easily go through all your content and have graphical view of your library; it's more like Windows Explorer.

I want to use a graphically organised app like (sorry) iTunes) on a tablet, where I have all my content clearly available and 'push' it to the Oppo.
This explains the process: What is a Media Controller? | Home Theater

jan
I understand. I do not like so much iTune, because one do not have any control on details of this media player. It have to be accepted what Apple want to put into it (setup)... But it may be better when about graphical view and exploring options.
So, open subject for further discussion...
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Old 9th May 2013, 09:25 AM   #402
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Quote:
Originally Posted by jan.didden View Post
Coris, when I understand you correctly, you play the files through the Oppo's interface (presumably your TV). I don't want that, it is too limited...
Hear hear. We can still have both, no need to loose that - but I too want to use a tablet on my lap - or my small 13.3" laptop - this is where things are heading and I have a lot of catching up to do.

Cheers, Joe
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Old 9th May 2013, 12:40 PM   #403
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I will give Mediahouse a spin when I get my (ordered) Android tablet (an Onda 818).
It seems to do what I want: a nice graphical interface to organise my content, and the ability to choose from whatever I have on line and push it to the Oppo.

https://play.google.com/store/apps/d...diahouse&hl=en

jan
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Old 9th May 2013, 10:30 PM   #404
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My verdict on Oppo 95 versus 105:

I have now done our "Level 3" on both players.

Level 2 was the SAW oscillator/clock on the Sabre DAC plus new I/V post-DAC module, beefed up Terra Firma (a servo-controlled power supply that is tuned down to a few millionth of a Hertz) and lowering noise floor in the power supply - especially to the Sabre DAC. Revised Earthing rounds things of.

Level 3 is basically using another SAW oscillator/clock on the MediaTek Main-Chip - the System Clock. This is achieved by the double-up frequency of the SAW divided down to either 25MHz (95) or 27MHz (105).

I have done a number of Level 3 Oppo 95 - and is just simply the best digital playback I have ever heard. Period!

I have only done - up to yesterday - one Level 2 Oppo 105. No Level 3 as the 54MHz SAW part didn't arrive until last week. This is Anthony Camplone's in Melbourne - and for his impressions, they were posted in #349.

Last night I finished Level 3 Oppo 105 - so NOW I can do BOTH players the same way.

It is clear that the Oppo 105 Level 3 is the superior - I was hoping that it would be as good as the 95 (four parallel phases used out of the Sabre DAC) would be as good as the 105 (only two parallel phases).

It is BETTTER!

But, and it is a little early to say, my initial feeling is that the balance is a little lighter - or maybe that is just an impression from hearing more airiness rather than actual tonal balance? Or it could also be interpreted as the Oppo 95 is a tad dark? But whatever - there is a clear verdict in favour of the 105 - it like a lithe athlete and its musical agility with rhythms and timing is extra-ordinary. The image focus, so good on the 95, has been further improved. And a cavernous soundstage when the recording requires it.

On the Burmester CDII - listen to the "Wall" track 13 - the work by Gilmour comes across as sublime as I have never heard before. But it is the various multiple sounds, many of them recorded in open air, these come out of the speakers completely unbounded and open air feeling and totally uncoloured. And they do that inside the mix of the studio sounds created by the musicians. It is a simple, yet now perceived as much more complex track, that mesmerises as more than just a strange instrumental piece - it becomes HYPNOTIC.

So there you are. I want to do more listening, but fairly sure that the above will be further confirmed - and more listening will reveal even more positive things.

Cheers, Joe

PS: The above comments I hope will not be taken as commercial spruiking - it is offered in the spirit that those who want to do DIY "operations" on the Oppo 105, that it is intended as a confirmation that this new model is potentially better than its previous model. I have spoken to a friend in NZ that has offered the view that the implementation of the Sabre DAC - not just the post-DAC circuit - has been improved upon by Oppo. In which case, to Oppo, BRAVO!
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Last edited by Joe Rasmussen; 9th May 2013 at 10:40 PM.
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Old 10th May 2013, 02:07 AM   #405
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Joe: I'm curious if you are planning to try your level 3 Mod on the 103 as well.
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Old 10th May 2013, 09:39 AM   #406
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Quote:
Originally Posted by TarnishedEars View Post
Joe: I'm curious if you are planning to try your level 3 Mod on the 103 as well.
I can understand that question.

The 103 only has one clock, So Level 3 (double-clock) doesn't really apply. but you can SAW the Master Clock (single-clock). Only the 95 and 105 has an additional clock on the DAC.

So...

That 27MHz in the 103 can now be done with a single SAW - so that makes it Level 2, I suppose..

There is not a huge difference between the 93 and the 103. Just over a week
ago, a client his back to get the 25/50MHz SAW fitted. It certainly took quite a jump in performance. It gave it some real wow factor.

I know I may be preaching and most are not listening, but I am convinced that SAW clocking is the way to go. In Malaysia there are some who have been listening and tried it with the Buffalo DACs as an alternative to the Crystek 957 oscillator. But the more you listen, the Crystek is soft and diffuse, whereas (and even more listening just confirms it) has a certain "rightness" - it just is so solid. Certainly the Bass is better and so is the sense of involvement you get.

Cheers, Joe
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Old 10th May 2013, 11:24 PM   #407
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Is it possible for mere mortals to obtain any of these SAW clocks without ordering something like 50 of them and waiting for 6 months?
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Old 10th May 2013, 11:53 PM   #408
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Quote:
Originally Posted by TarnishedEars View Post
Is it possible for mere mortals to obtain any of these SAW clocks without ordering something like 50 of them and waiting for 6 months?
Yes, the 100MHz SAW is readily available. That can be used on the Sabre DAC, but not much elsewhere. SAWs are basically high frequency - so using them is limited as you cannot get them at the usual frequencies used in audio digital.

The Sabre DAC is different - rated up to 100MHz - search for this, just Google it using copy and paste:

EPSON TOYOCOM - XG-1000CA 100.00MHZ 100PPM CC - OSC, SAW, 100.00MHZ, 100PPM, 3.3V

I got some from Farnell/Element14 - but there should be others, just try track them down. I saw somebody selling on eBay out of UK.

We are limited to experience using the Epson Toyocom version - but there are other manufacturers making 100MHz SAWs as well. They can be tried too. But the Toyocom is safe.

In the Oppo 95, I was able to get some 50MHz SAWs off the shelf - using a divide-by-two circuit was able to get 25MHz for the '95.

In the Oppo 105 they changed the 25MHz to 27MHz - so needed 54MHz custom made to get 27MHz using the same divider technique.

Don't expect to see any SAWs below 50MHz.

BTW, the Toyocom version we have been using are quite cheap. Don't by just one, BUY TEN.

Then spread the word - they are tiny and go into an envelope real easy like.

Cheers, Joe
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Old 11th May 2013, 08:02 PM   #409
Coris is offline Coris  Norway
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At this time I ended a successful (wonderful functional) experiment with 108Mhz clock for DAC and divided by 4 to get the 27Mhz clock for MediaTek chip. The divider I used (heaving at the time) is not very performant (0.5ns skew). Not very special oscillator either, Even though the improvement in picture is obvious. The 2D picture get really depth. Spatial image, no more only flat picture. This is because the increasing quite much in tonal and huge definition of the gradients. This is when about a very high quality HD pictures (static).
What say more about sound? Impressive! Really wide soundstage. Easy to hear and detect the position of two timbales hitted by the drummer around him. Depth and wide stage of sounds, and higher dynamic. Every single bass sound to the lowest possible is penetrant, well noticeable, hear it and feel it.
Of course this improvements may not be so obviously without another important mods in place, specially in audio stage (DAC chip itself and post DAC signal processing).
I have to notice (as Joe did) that with this last Oppo model is more easy to get important improvements, with not so wide/deep modifications everywhere in the device. Only in the right places...

Waiting now to get a 15ps skew divider, and 108Mhz SAW oscillator. Will take a little while this I suppose... In my opinion this is the way.
My goal now is to build a master clock/frequency for whole the machine. With a little bit luck it will be done... It is a little bad that QDEO chip use 20Mhz clock, or MediaTek use a 27Mhz one....

Last edited by Coris; 11th May 2013 at 08:10 PM.
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Old 12th May 2013, 06:46 AM   #410
Coris is offline Coris  Norway
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Default a out of topic post...

I`m quite sure that some critics here will ask me how I can see the picture improvement of this modded player. I should have an display/flat screen which it can show such improvements.
Well, I think I have... Ii is an Philips TV with 17 bit (color processing). At last it is specified like this... Oppo player process the picture colors at 36 bit... Quite double. Anyway, in this area one find the tonal definition and the gradients too.
Even though the specifications of the TV screen are like they are, the device is not functioning at full quality parameters, the electronics inside can give. Why? Because of the design... And maybe some other unreasonable reasons...
What to be done to fix this? Some modifications...

I take the risks to post here a text which is out of topic...

What it can be modified in a TV screen to get a better picture? Quite simple. The poor quality picture (when using a good processing device) come mainly from the high temperature that processing device is forced to work (by stupid designers). Lower quite much that temperature (which increase a lot the noises inside the chips), leads to a instant beautiful functioning component/device.
How to do this? If one take the risks to open an quite expensive and big enough flat screen, will see one that there is a main processor there, which it have a very small heatsink on it. This chip work as usually at around 50 degree C. Or even more in 3D processing. Well, that designers are not they very stupid... An electronic component which it work at high temperature will not have a long life to live. This help that company to sell the new products, after a number of hours the old one start to bad function... Because shorted life of the components working at high temperature (f. ex.)... Theat number of hours a product may fail is very carefully calculated, accordingly statistics, and studies about customers behaviours. The customers do not pay the price to fix an such bad functioning device. They want to buy new... and throw the old one. This is called marketing long term strategy.

So, back to the TV screen. The simple modification here, to get a well functioning device, is to mount only a so big heatsink one can mount in that disponible place. A big surface tyn Alu plate is the best one can get in this place. A such it can lower the working temperature of the processor to something around 30 degree C. So, just do it (on your own risk). If one work carefully, the result is accordingly. Much bigger heatsink, very good thermal contact with the processor, some mechanical precautions to get a solid/safe construction. That`s it!
There is something about the switching PSU in the TV screen too. The designers and the production stage do not care much about how the wires are routed inside. The PSU make quite much noises which it goes (induced by wires) to the sensitive digital signals very near those (quite long) connection wires. Care about this aspect. Rout carefully those wires, even shield those accordingly, mount some ferrite bead (where is possible), plant some extra filtering (good) caps where is needed. That`s it!

This (simple) way(s) one get an very impressive quality HD flat screen... Which it may be used to appreciate an improved picture from a Oppo player...

Last edited by Coris; 12th May 2013 at 07:05 AM.
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