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post #2671 of 2685
Quote:
Originally Posted by lieberung View Post


I tried switching between 16 bit 44.1Khz and 24 192Khz but not as high as 32 bit 384Khz even though that is an option in the list. I'll try that tonight. I tried switching between 16 and 24 bit integer and floating, and 32 bit an a 24 bit packet in jriver but none of this had any effect on the distortion/crackling. I havent tried linux (dont have a pc with linux running atm).
Also tried 2 different hdmi cables, 1 m and one 30 cm. No difference.

 

These settings won't have any effect on your setup unless you are outputting to your dac in direct mode as opposed to wasapi or asio.  Shared mode allows all windows sounds to be played through you sound device, card , dac etc but you don't want this because all of your music would go through the windows mixer before reaching your dac.  If you are using wasapi or asio or kernel streaming you are running in exclusive mode which gives just one program (J River) exclusive control over your dac while that program is running.    

 

I wish I could help with the Hydra issues but you are already talking to the right guy about that.

post #2672 of 2685
Quote:
Originally Posted by Articnoise View Post
 

My wild guess is that the dac is clipping because it getting signals that has too high gain or with to high sample rate. Does the Audiobyte up sample internally with the wordclock or masterclock?

By lowering the digital volume the dac gets some more headroom then it reducing the number of bits, but will it play bit perfect.


Yep, that is a good theory.   Perhaps data alignment is pushing LSB data bits to MSB positions and causing the M7 to clip at normal volume.

post #2673 of 2685

I've said this before but I believe I am finished tweaking the HDMI I2S interface on the M7.  Until something else comes along (famous last words!)....  But this time going a little further up the signal chain.  Since I am running no PLL I wanted to try a faster data buffer on the M7 DSP board for the input #5 I2S signals.  The data buffer chip (circled in yellow below beside the input 5 connector) receives the I2S signals from the backpanel and re-transmits them by the DSP board circuit traces to the M7 DSP.  The chip I used is from a funny named company - Potato Semiconductor - and has less input capacitance that can slow or smear the transitional edges (low to high, high to low) and introduce jitter.  Same with its output, less capacitance and higher drive gets this chip in the Ghz frequency range - the fastest chip of its type.  The change is not overly dramatic but feel it gets me a little closer to sonic nirvana.  Slightly more of everything good - less hissy highs, big stage, and better low level detail like reverb tails.  I am pleased!

 

The Potato "chip" is a PO74G125A and replaces the 74H125.  You can get them on Ebay by searching "74125 Ghz".  Requires desoldering the old chip and soldering the new one in its place.   Definitely not for the unskilled and may void your warranty.

 

post #2674 of 2685
I spent whole night reading 178 pages about the M7 and would be good to see some conclusions. biggrin.gif

- If I have it right, replacing ACSS cables is worth to try and may improve the sound.
- Spdif BNC or RCA may differ in sound because of different receiver chips (good thinking, like it!)

The other one is around i2s input and seem to be more difficult:
- What source (streamer) is recommended and works well with M7 and i2s input?
- USB on M7 is not the best end a DI is recommended?
- What is the best alternative for DI?
post #2675 of 2685
Quote:
Originally Posted by JAGS View Post

I spent whole night reading 178 pages about the M7 and would be good to see some conclusions. biggrin.gif

- If I have it right, replacing ACSS cables is worth to try and may improve the sound.
- Spdif BNC or RCA may differ in sound because of different receiver chips (good thinking, like it!)

The other one is around i2s input and seem to be more difficult:
- What source (streamer) is recommended and works well with M7 and i2s input?
- USB on M7 is not the best end a DI is recommended?
- What is the best alternative for DI?

IMHO...

 

ACSS interconnect is better than XLR AES, RCA,  to an Audio-GD Amplifier in that order.

 

I2S/HDMI input to M7 is better than SPDIF/BNC and AES in that order

 

My Streamer is dual PC's running Windows 2012 R2 and Jplay 

 

Using Audio-GD DI-2014 USB to HDMI/I2S converter from Streamer to M7 DAC (Great Combo). This is slighty better than my Audiophilleo 2/Purepower into the M7 SPDIF/BNC, which is slightly better than the direct connect into the M7 via its USB port

 

frizzup

post #2676 of 2685
Quote:
Originally Posted by frizzup View Post

IMHO...

ACSS interconnect is better than XLR AES, RCA,  to an Audio-GD Amplifier in that order.

I2S/HDMI input to M7 is better than SPDIF/BNC and AES in that order

My Streamer is dual PC's running Windows 2012 R2 and Jplay 

Using Audio-GD DI-2014 USB to HDMI/I2S converter from Streamer to M7 DAC (Great Combo). This is slighty better than my Audiophilleo 2/Purepower into the M7 SPDIF/BNC, which is slightly better than the direct connect into the M7 via its USB port

frizzup

Thanks!
-> Replacing ACSS Audio-GD cables for something else may improve the sound
-> Time to get a DI-2014 biggrin.gif
-> Best option in my humble view is a i2s streamer...
post #2677 of 2685

I would go in order of importance (if you now have a standard computer and generic cables): 1. Better USB card or CAPS or audio streamer 2. USB to IS2 converter 3. Better USB cable 4. Better HDMI cable 5. Better power cord 6. Better ACSS cable 7. Better media player.

It maybe looks like I don’t think that a better ACSS or media player is important, as I place them after other cables - I do, just not equally much.

post #2678 of 2685

The Master 7 is a great sounding DAC and responds well to front end input upgrades - players, USB, I2S.   Initially I would concentrate on that as cables are just tweaks that reinforce what you like or don't like in your system.

post #2679 of 2685
Quote:
Originally Posted by Articnoise View Post

I would go in order of importance (if you now have a standard computer and generic cables): 1. Better USB card or CAPS or audio streamer 2. USB to IS2 converter 3. Better USB cable 4. Better HDMI cable 5. Better power cord 6. Better ACSS cable 7. Better media player.



It maybe looks like I don’t think that a better ACSS or media player is important, as I place them after other cables - I do, just not equally much.



Thanks! Regarding 1: What do you mean with better "CAPS"? (Missed this one I guess)
post #2680 of 2685
Quote:
Originally Posted by DACLadder View Post

The Master 7 is a great sounding DAC and responds well to front end input upgrades - players, USB, I2S.   Initially I would concentrate on that as cables are just tweaks that reinforce what you like or don't like in your system.

Understood and this is exactly my experience. Am using a very good spdif streamer (Ultimo) and got clearly better results compard to Asio driver with USB on Windows.

When I install the USB driver of Audio GD it shows "USB Spdif" when selecting in Foobar. Is this just a name, "Spdif"? It looks strange as it is asynch and not spdif.
post #2681 of 2685
Quote:
Originally Posted by JAGS View Post


Thanks! Regarding 1: What do you mean with better "CAPS"? (Missed this one I guess)

 

You are welcome and good luck. What CAPS is, lock hear:  http://www.computeraudiophile.com/section/c-p-s-489/

post #2682 of 2685
Quote:
Originally Posted by DACLadder View Post
 

The Master 7 is a great sounding DAC and responds well to front end input upgrades - players, USB, I2S.   Initially I would concentrate on that as cables are just tweaks that reinforce what you like or don't like in your system.

 

Not to debate cables, but something like a Wireworld ultraviolet USB can be bought for 50 USD new and make the sound so much enjoyable than a generic one, IME.

If we talking about something above the ultraviolet level that is tuning for me. Just for fun I tried the USB cable that come with the Master 7 and I’m not joking it destroyed the sound for me.

DACladder if not too much problem please try the stock/AGD USB cable and tell me how it sounds or more correct change the sound.

post #2683 of 2685
Quote:
Originally Posted by Articnoise View Post

 



You are welcome and good luck. What CAPS is, lock hear:  http://www.computeraudiophile.com/section/c-p-s-489/



Looks promissing. Some other options are:
- Auralics (USB out)
- Pink Faun (i2s out)
- Soundaware Pro ( i2s or usb out)
post #2684 of 2685
Quote:
Originally Posted by Articnoise View Post
 

 

Not to debate cables, but something like a Wireworld ultraviolet USB can be bought for 50 USD new and make the sound so much enjoyable than a generic one, IME.

If we talking about something above the ultraviolet level that is tuning for me. Just for fun I tried the USB cable that come with the Master 7 and I’m not joking it destroyed the sound for me.

DACladder if not too much problem please try the stock/AGD USB cable and tell me how it sounds or more correct change the sound.


If I received a USB cable from AGD I never used.  Not saying cables don't make a difference but I really couldn't hear a lot of change for the better until I got the M7 front end input tuned up.  And cables I thought were harsh  2 yrs. ago are now clean, clear, and add the right amount of sparkle.  Perhaps M7 newbies now don't start with such a deficit like the early USB32 firmware. :confused_face:  By all means experiment and let us know what you find!  But don't use a crappy cable expecting spectacular results until proven otherwise.

post #2685 of 2685

Anyone? When I install the USB driver of Audio GD it shows "USB Spdif" when selecting in Foobar. Is this just a name, "Spdif"? It looks strange as it is asynch USB and not "spdif interface".

 

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