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Audio-Gd Master 7 - Discrete Fully Balanced DAC (PCM1704) - Page 88

post #1306 of 3498
Quote:
Originally Posted by DACLadder View Post
 

Thanks, it was an uphill battle all the way.  You can read all about my trials with the RJ45 I2S in this M7 thread starting in the mid 60s pages.  For me the the sound is more consistent with HDMI I2S versus the RJ45. 

 

Hello I was wondering, If I could ask kingwa for HDMI i2s  but I don't know if theres a standard for that input or If I'd have to request it specificly to work with the OR5.

 

Yes I'm joining the club too.

post #1307 of 3498
Quote:
 Hello I was wondering, If I could ask kingwa for HDMI i2s but I don't know if theres a standard for that input or If I'd have to request it specificly to work with the OR5.
 
Yes I'm joining the club too.

Welcome!  Unfortunately HDMI is not electrically compatible with the RJ45 I2S without a converter chip.  But if you need HDMI I2S input let Kingwa know what you need.  If it makes business sense and improves his products why not?   I would be the first in line to buy an upgrade kit.  It is really simple to install if you have the correct pieces. 


Edited by DACLadder - 2/8/14 at 2:03pm
post #1308 of 3498

Appreciate all the PMs about I2S over the HDMI physical interface.  I contacted Kingwa and he does not have any interest in offering differential I2S inputs.   Kingwa is concerned over licensing "HDMI" and cites very little customer demand.   I don't see anything to license if you don't call it "HDMI I2S".   Differential I2S is not compatible with regular HDMI.   We are just borrowing the chips and cable used for HDMI in another purpose entirely.  Similar to using a video coax cable for S/PDIF.  But respect Kingwa's decision.

 

And financially does not make sense for me to offer upgrade kits.  My project is about 80% complete but works well enough for my purpose.  And will supply any and all information on request.  It really is a significant upgrade over RJ45 I2S.

 

So I am going to stop calling it "HDMI I2S".   Differential I2S, LVDS I2S, Super I2S, I2S 2.0+, or some other descriptive name...  


Edited by DACLadder - 2/10/14 at 7:13am
post #1309 of 3498

Oh well.  It's awesome that your still going on with this, I usually see if there's a new post from you =p

 

I heared of the new 2014 drivers for USB32, seems an improvement in SQ, ¿Have you had a chance to check that?

 

Mow

post #1310 of 3498
Honestly I never installed the updated driver as I only use it with the offramp
With the rj45 jack input. Also I did change the resisters at the rj45 jack to 75 ohm terminations.
As I am interested in the hdmi board. I do not think it would make that much of improvement tontry it
If there was a simple plug and play even if removing the USB
That I would do. But as dac ladder is not providing and kingwa is not
There is no shot at this now.

Al
post #1311 of 3498
Quote:
Oh well.  It's awesome that your still going on with this, I usually see if there's a new post from you 

Thanks a lot.  I wish I could offer upgrade kits but the small board I designed requires some minor adjustments. Plus the cabling needs something more friendly and compatible for easy installation.  I have already invested a lot of effort and money in first RJ45 cables and termination.  And then two prototype PCBs/parts for the HDMI type interface to get to where I am today.  I spent the last four months tweaking, adjusting, designing and building.   So I am more than ready to pass the torch if any engineer/ tech types want to step up to the plate.  The hard parts are done and just the final packaging remains for some type of product.  And I would order the first one!

 

So I would not lose hope.  Someone is going to come along and hopefully take up where I left off.  After listening for over a week the differential I2S improves SQ consistency.  I just received the Off Ramp Dynamo AC power supply last Friday and that is another big leap in sound quality.  The Master 7 just keeps getting better and better.  If you know anyone that is interested in taking the helm let me know.

post #1312 of 3498
You have my email send me info. Please I would like to try it at least to see witch sounds better .

Al
post #1313 of 3498
Quote:
Originally Posted by DACLadder View Post
 

Thanks a lot.  I wish I could offer upgrade kits but the small board I designed requires some minor adjustments. Plus the cabling needs something more friendly and compatible for easy installation.  I have already invested a lot of effort and money in first RJ45 cables and termination.  And then two prototype PCBs/parts for the HDMI type interface to get to where I am today.  I spent the last four months tweaking, adjusting, designing and building.   So I am more than ready to pass the torch if any engineer/ tech types want to step up to the plate.  The hard parts are done and just the final packaging remains for some type of product.  And I would order the first one!

 

So I would not lose hope.  Someone is going to come along and hopefully take up where I left off.  After listening for over a week the differential I2S improves SQ consistency.  I just received the Off Ramp Dynamo AC power supply last Friday and that is another big leap in sound quality.  The Master 7 just keeps getting better and better.  If you know anyone that is interested in taking the helm let me know.

 

Maybe you could charge for making them and be a millionaire! :P

 

PD: Master-7's lead time increased from 10 to 15 days :O


Edited by mowglycdb - 2/11/14 at 7:43am
post #1314 of 3498

Prolly your (& everyone's) best bet is to turn it over to Kingwa (+ developer/finder's fee, if yer lucky), and have him offer it as an upgrade option for his DAC product(s).  You did develop it for the OR5/M7 I2S interface, after all.

 

I haven't done any real survey of available 3rd party sources and output signal protocol converters with I2S output capability, but I would bet that the bulk of those products use the HDMI format.  It would be in Kingwa's best interest to upgrade his I2S connection, or at least offer as an option.

 

Anyway, that's my guess.

post #1315 of 3498
I have three dacs that use a i2s input and two of the three use a cat6 or 7 rj45 protocal.

Al
post #1316 of 3498

HDMI offers balanced signal, FWTW.

post #1317 of 3498
FWTW ?
post #1318 of 3498

There's quite a few companies offering RJ45 I2S.  Nothing wrong with it if you could maybe engineer the complete package - source, cable, and destination.   As a general rule TTL signals run on cables between boxes is not the best solution especially trying to keep pristine quality.   After reading about HDMI, the HDMI transmit/ receiver chips, and HDMI cable tests it seems the better solution for delivering high speed signals with low jitter.  I sure had a lot of issues trying to make single ended TTL (LVTTL) work in my setup. 

post #1319 of 3498

I have decided to stuck with the embedded M7 USB32 a little bit longer. However, I would like to try a better USB cable just for fun. I don't believe in digital cables but the sceptic in me would like to hear it.

 

Has anyone tried any of the so-called "audiophile" USB cables with the M7?

 

I would like to try the Wireworld Ultraviolet or Wireworld Starlight. Is it a good choice for the M7? Any experience and/or tips?

 

_________________________

And one of the interesting posts: http://www.head-fi.org/t/681542/anyone-heard-own-usb-wireworld-starlight-starlight-7-or-starlight-usb-3-0/15#post_10075280


Edited by seaice - 2/11/14 at 10:30am
post #1320 of 3498

Try all sorts of cables from Ratshack, Belden Gold, homemade, etc. Whatever you can get your hands on. Expensive "audiophile" doesn't necessarily mean better, just different. But sometimes different does sound better.

 

These are the tips I offer you based on my experience. And no, I will not recommend anything because my tastes in cables may not be the same as yours.

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