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Old 16th January 2013, 11:15 AM   #1141
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Quote:
Originally Posted by themystical View Post
Perhaps deeper, better defined bass is perceived by me as less bass.
There probably are noise issues (in the electronic measurement sense) in my system as I use a lot of valves including in the output stage of the DAC
Yes running with a 80MHz clock. Not yet tried synchronous but probably worth exploring.
As a matter of interest, which quantizer setting gives you the best subjective fidelity. Does this align with 6bT apparently giving the best theoretical SNR and THD? What filter settings do you use?
In general the higher the quantizer bit depth the better the fidelity.
True mode must be used.

Filters with highest bandwidth or no filters if possible..
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Old 16th January 2013, 12:55 PM   #1142
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I like this Discussion, looks like we are summarizing lots of experiences and info spread around many different websites.

Another questions:

-Anyone did percive sound quality improvement eliminating USB power supplay and using an internal DAC 3.3V source?
- I am using Buffalo III with amanero and I am looking at the Buffalo manuals to figure out if I have a 3.3V source that I can use to feed amanero, but not sure if it's worth it.
- What about those I2C isolator chips?

Cheers
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Old 16th January 2013, 03:57 PM   #1143
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Quote:
Originally Posted by RayCtech View Post

Lower jitter = deeper bass and better defined bass.
Thus I expect your system may have jitter or noise issues.
I found this statement by Dustin Forman, the chip designer very illuminating with regard to the DPLL Bandwidth setting.(although not made in the specific context of the Sabre DAC chip)
Jitter blocking
The issue appears not to be purely about "unlocks" but also about "reading" all of the data it receives. In this context, the "Lowest" setting although providing a full lock might not be "best" setting and there may be some data loss occuring. This may also explain my perceived better bass and 'not thin sounding' at higher DPLL bandwidth settings. The "best" setting ultimately depends on your source....and getting the balance between jitter rejection and "reading all of the data" right. Anybody know the algorithm used by ESS for determining the "Best" setting in their ES9018 chip?
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Old 16th January 2013, 05:18 PM   #1144
glt is offline glt  United States
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Quote:
Originally Posted by themystical View Post
I found this statement by Dustin Forman, the chip designer very illuminating with regard to the DPLL Bandwidth setting.(although not made in the specific context of the Sabre DAC chip)
Jitter blocking
The issue appears not to be purely about "unlocks" but also about "reading" all of the data it receives. In this context, the "Lowest" setting although providing a full lock might not be "best" setting and there may be some data loss occuring. This may also explain my perceived better bass and 'not thin sounding' at higher DPLL bandwidth settings. The "best" setting ultimately depends on your source....and getting the balance between jitter rejection and "reading all of the data" right. Anybody know the algorithm used by ESS for determining the "Best" setting in their ES9018 chip?
From my own observations, it appears "Best" is near the high side of the scale. I think it is just a constant setting rather than an algorithm. Of course this is just based on observations.
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Old 16th January 2013, 06:34 PM   #1145
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Quote:
Originally Posted by glt View Post
From my own observations, it appears "Best" is near the high side of the scale. I think it is just a constant setting rather than an algorithm. Of course this is just based on observations.
My listening experience would suggest that although the Amanero interface locks at the lowest settings without any issues, higher settings are required for the Sabre to retrieve all of the data. Other guys running the Amanero interface into a Sabre chip could perhaps listen to "high side" settings and post some views?
I noticed that Dustin Forman's last post was in 2011 so I guess it is not possible to get a definitive response from ESS on this forum anymore?
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Old 17th January 2013, 02:57 AM   #1146
kp93300 is offline kp93300  Malaysia
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Quote:
Originally Posted by gioz View Post
...I have to order "High Bandwidth" Firmware chip for Buffalo-II from TP ...right??
Hi gioz,
I have B2 with this board and have occasional unlocks that decrease with warm up also..
Have you manage to solve the problem with the new Firmware chip from TP?
thanks

kp93300
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Old 17th January 2013, 07:42 PM   #1147
gioz is offline gioz  Italy
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Quote:
Originally Posted by kp93300 View Post
Hi gioz,
I have B2 with this board and have occasional unlocks that decrease with warm up also..
Have you manage to solve the problem with the new Firmware chip from TP?
thanks
kp93300
Yes (..I hope), I'm waiting the fw from TP
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Old 18th January 2013, 11:50 AM   #1148
regal is offline regal  United States
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GOOD NEWS. The new intel chipset (8 series) for Haswell will have native USB2.0. I was afraid that they would go full USB 3.0 since USB 3.0 has native asynchrous mode making UAC2 and any 480mbs USB 2.0 drivers obsolete.

But the fact that intel is sticking with a native USB 2.0 we can be comfortable both on the Mac side and the PC side for many years. Anyone who has tried to run a 480bs USB interface from a USB3.0 port knows that it is NOT backwards compatible.
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Old 18th January 2013, 11:59 AM   #1149
Telstar is offline Telstar  Italy
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Really?
I can do the test but I remember some friends using usb3 controller cards with asynchronous USB.
Or you ment NOT in asynchronous mode?
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Old 18th January 2013, 12:03 PM   #1150
regal is offline regal  United States
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Quote:
Originally Posted by Telstar View Post
Really?
I can do the test but I remember some friends using usb3 controller cards with asynchronous USB.
Or you ment NOT in asynchronous mode?
I haven't had any luck with backward compatibility of USB3 running 480mbs proprietary driver asynch. I've tried several usb boards none worked, they won't eeven run Magic Jack !
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