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Audio-Gd Master 7 - Discrete Fully Balanced DAC (PCM1704) - Page 84

post #1246 of 2307
Quote:
Originally Posted by Benny-x View Post
 

As annoying and effortless as it sounds, I'm pretty sure the honest answer is 'no'. Don't look at it as if I2s is some standardized format that is just being sent via one termination or another and that should be easily switchable, look at simply as a term; and one that in this case means different things from different companies. And Empirical Audio can do it because they're a manufacturer and they have the source signal from their custom made gear to work with, serious expertise, thousands of dollars, and their own company which specializes in digital audio. I'm not sure who you are, but I don't have those resources available for my DIY audio hobby.

 

I recently got the pin-out from the PWD Mkii HDMI-I2s from PS Audio because I was looking at making up my own LVDS->HDMI I2s cable to feed from an Audio-gd DI-V3 I2s output to my PWD Mkii HDMI-I2s input. I don't know much about the format, but as soon as I saw what was going on I gave up on the idea.

 

For me, it's back to trying to find a USB-> HDMI I2s convertor that doesn't cost more than my DAC... Damn pricey OR5... And although I know the OR6 is going to be in the same bracket, does anyone have any info on it yet? Now that Steve is moving away from the HiFace chipset I'm interested to hear some reviews. Especially since it'll be able to do Integer Mode now :-D  That was one thing I really didn't like about it before, and also that USB->XXX convertors that could were said to approach the OR5 with Integer Mode enabled. Now with a levelled playing field the OR6 should be a show stopper?

 

I'm pretty much out of my depth here, but it seems like conversion of a SE I2S LVTTL format (M7) to a balanced LVDS format (PWD) would be more difficult than a balanced LVDS to a SE LVTTL formats.  I'm still hopeful that my balanced PWT to SE M7 I2S conversion is achievable, based on DACLadder's efforts on his similar OR5 HDMI to M7 LVTTL per above.

 

The ironic thing it seems to me is that Kingwa was really touting his USB32 input signal port addition on the M7.  And you guys here are really poo pooing it relative to the I2S connection on OR5. It's nothing if not audiophilic, eh?  :wink:

post #1247 of 2307
Quote:
Originally Posted by DACLadder View Post
 

I didn't make the PS Audio/ PWT connection at first but yes it should work OK.   The OR5 HDMI was designed around the PS Audio and Wyred4Sound equipment.

 

But send the pinouts and will double check...

 

Thanks for the hand up, DACLadder.  PM's in the mail...

post #1248 of 2307

Has anyone tried one or more of the following USB "conditioners" with the Master 7?

 

Empirical Audio Short Block - http://www.empiricalaudio.com/products/short-block

iFi iUSB - http://www.ifi-audio.com/en/iUSB.html

Aubisque USB - http://www.ultrafi.biz/aubisque-usb-filter.html

 

I have been digging facts and experiences with these devices and this is what I have found so far:

These devices do not work only as a USB power purifiers / disconnection of the USB power. They solve more complex problems and have positive effects in most systems because they impact the USB data path as well. The technical side is not fully clear to me but I would like to hear some direct experiences with the M7.


Edited by seaice - 2/1/14 at 2:57am
post #1249 of 2307

I was very curious of using a Resonessence Labs Concero as a converter with the Master 7. Unfortunately our currency dumped about 15% of its value last week and now I can't afford the Master 7 again. The joys of living in emerging market countries.

post #1250 of 2307
I have two of the three items you are asking about. Here are my thoughts
The short block helps , but not a a lot .
The ifi USB a little not a lot .
The third one I do not have.

Now the M7 lifts the power from the USB so any ISO type device that uses the seperate the power from the CPU will not have a profound effect. On the sound. They help but not a lot.
Now the offramp5 and the short block with the i2s is a very big change and if you like the sound of the M7 it is a worth while investment. But you must get the turbo clocks so you are looking at about 2200. More. And if you can get his updated PSU or get your own the sound gets even better. Now there is an updated firmware for the USB that people here are claiming it makes a big improvement. I have not done this update and as such I cannot say .

Al
post #1251 of 2307
post #1252 of 2307

Al, many thanks for the info! I will check the link.

 

The Offramp 5 is still tempting me but I am not sure about the investment. The latest 2014V2 M7 firmware is good and I have almost decided to leave the Offramp 5 path. But I have some computer/USB noise related problem and I hope that one of these "USB conditioners" could help: I hear a high frequency noise if my M7 is connected directly to the computer via USB. The noise disappears if the M7 is connected via the DI-V3 coax (the DI-V3 is connected to the comp in this case). The problem is not really annoying because the noise is not present at the normal volume levels used for listening. But it is evident that something unwelcome is entering the M7 via the USB input.


Edited by seaice - 2/1/14 at 12:38pm
post #1253 of 2307
Quote:
Originally Posted by seaice View Post

But I have some computer/USB noise related problem and I hope that one of these "USB conditioners" could help: I hear a high frequency noise if my M7 is connected directly to the computer via USB. The noise disappears if the M7 is connected via the DI-V3 coax (the DI-V3 is connected to the comp in this case). The problem is not really annoying because the noise is not present at the normal volume levels used for listening. But it is evident that something unwelcome is entering the M7 via the USB input.

You should try getting a spare USB cable and cutting the +5v wire. Its usually red. If that works then you have saved yourself alot of money.
post #1254 of 2307
I agree with the cable but kingwa does not use the USB power in the USB input
I know cause I asked. But a short block may help cause it also has a chock inside

Also I assume you have tried a different CPU and other USB ports as well

Al
post #1255 of 2307
Quote:
Originally Posted by ALRAINBOW View Post

I have two of the three items you are asking about. Here are my thoughts
The short block helps , but not a a lot .
The ifi USB a little not a lot .
The third one I do not have.

Now the M7 lifts the power from the USB so any ISO type device that uses the seperate the power from the CPU will not have a profound effect. On the sound. They help but not a lot.
Now the offramp5 and the short block with the i2s is a very big change and if you like the sound of the M7 it is a worth while investment. But you must get the turbo clocks so you are looking at about 2200. More. And if you can get his updated PSU or get your own the sound gets even better. Now there is an updated firmware for the USB that people here are claiming it makes a big improvement. I have not done this update and as such I cannot say .

Al

 

I've done the update and didn't like. Firstly they have disabled the volume control from Windows, so I'm continually changing the volume on my preamp because each song is not at the same volume. Secondly the sound are leaner, a bit harsh.
post #1256 of 2307
Quote:
Originally Posted by ciphercomplete View Post


You should try getting a spare USB cable and cutting the +5v wire. Its usually red. If that works then you have saved yourself alot of money.

 

Hello, 

 

I've the same problem, I wait the revelation audio labs prophecy dual conduits that separate the power from the data. I will can tell you if it resolves the issue.

post #1257 of 2307
The USB seems to be a mixed review
So I have not bothered to try it yet
And the offramp is much better anyway

Al
post #1258 of 2307
I have not had any noise with mine
As I do not use it anymore but all the time I did
It was quite.

Al
post #1259 of 2307
I have a dumb question is the CPU and M7
Using the same outlet ?
It should be. Or same outlet strip and grounded
Al
post #1260 of 2307
Quote:
Originally Posted by ciphercomplete View Post


You should try getting a spare USB cable and cutting the +5v wire. Its usually red. If that works then you have saved yourself alot of money.

 

Thanks! I tried this but it did not help.

 

Quote:
Originally Posted by ALRAINBOW View Post

Also I assume you have tried a different CPU and other USB ports as well
 

 

Thanks! I tried different USB ports but it did not help.

 

Quote:
Originally Posted by Hun7er View Post
 

I've done the update and didn't like. ... Secondly the sound are leaner, a bit harsh.

 

I like the 2014V2 firmware. Fortunately, it is not harsh with my HP amp. The synergy is great.

 

Quote:
Originally Posted by Hun7er View Post
 

 

Hello, 

 

I've the same problem, I wait the revelation audio labs prophecy dual conduits that separate the power from the data. I will can tell you if it resolves the issue.

 

Thanks! I tried the following local solution - USB cable with separated USB power and USB data conductors: http://www.kabelguru.cz/product-en/digital-cables/kabelguru-usb-pwrs/27

It did not help.

 

After all of my attempts I finally think that the noise travels with the USB data signal...


Edited by seaice - 2/1/14 at 1:26pm
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