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Old 21st March 2011, 09:22 PM   #181
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Default i2c via USB

exa065,
could you add the i2c header and driver to "tunnel" the i2c bus from computer to exaU2I via USB??? It will be usefull to control ES9018's volume-control registers.
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Old 21st March 2011, 09:26 PM   #182
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by exa065 View Post
However for the benefit of the users out there that have DAC boards with 80 MHz clocks I modified one of my DACs and I've managed to replicate the issue.
Thank you very much for the report.

I guess the quality of I2S signals of your device is not so bad, none the less,
you have also encountered the issue.

Your finding is very valuable for me.
Thanks a lot again.
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Old 22nd March 2011, 06:02 AM   #183
elecon is offline elecon  Japan
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Hey RayCTech
Quote:
The problems you mentions have not been any issue with my JFET regulated SDTrans192 units or my JFET regulated ES9018 based DACīs.
Does this mean that you actually successfully managed to play 352.8kHz/24bit files without continuous noise into your ES9018 based DAC using an 80MHz master clock as long as both the transport and the DAC was employing your original JFET regulators?

As you know I have also been participating in the SDTrans 192 project and also actively supported the development of the Fidelix Caprice ES9018 based DAC. As you know I have one SDTrans 192 Rev2.1 modified by yourself with your JFET regulators, but it still is not able to play noiseless with neither the Buffalo nor the Caprice when using an 80MHz master clock.

I apologize to exa065 if this is considered out of topic. I also think that exa065 Post #180 makes clear that the noise problem during playback into a ES9018 based DAC using 80MHz clock remains the same whether the playback transport is an exaU2I or an SDTrans192. (Unfortunately no-one has yet been able to have both devices present at the same time and test under identical conditions. Maybe RayCtech will be the first one? ;-))

I very much support the exaU2I (which I have on order) as well as the SDTrans 192. I think both devices are complementary and for slightly different applications. While the exaU2I is intended for file playback from a computer, the SDTrans 192 allows computer-less, battery-powered file playback. Keep up the good work on both of these great devices :-)

Last edited by elecon; 22nd March 2011 at 06:18 AM.
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Old 22nd March 2011, 08:25 AM   #184
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Quote:
Originally Posted by elecon View Post
Does this mean that you actually successfully managed to play 352.8kHz/24bit files without continuous noise into your ES9018 based DAC using an 80MHz master clock as long as both the transport and the DAC was employing your original JFET regulators?
Yes - I was for a long time not even aware that this was supposed to be a problem, but I was able to recreate circumstances that was able to cause similar problems.
I uses the Sabre32 pinout and not the Sabre8 pinout and functionality of the ES9018 chip and have a completely different programming that also includes support of 352.8k and above even with a 80MHz clock, but I uses a 98.304MHz clock with superior performance compared to a 80MHz clock.

Quote:
Originally Posted by elecon View Post
As you know I have also been participating in the SDTrans 192 project and also actively supported the development of the Fidelix Caprice ES9018 based DAC. As you know I have one SDTrans 192 Rev2.1 modified by yourself with your JFET regulators, but it still is not able to play noiseless with neither the Buffalo nor the Caprice when using an 80MHz master clock.
A combination of informations from the datasheet for the ES9018 and then optimal programming and then circuits between the DAC chip and the speakers that have good enough common mode rejection allows use of a 80MHz clock, but when playing at 352.8k and above you should both increase the clock speed and change the programming for better performance.
I found that the combination with both a 98.304MHz clock and the proper programming for 352.8k (352.8k to 1536k) was a real winner.

Quote:
Originally Posted by elecon View Post
I apologize to exa065 if this is considered out of topic. I also think that exa065 Post #180 makes clear that the noise problem during playback into a ES9018 based DAC using 80MHz clock remains the same whether the playback transport is an exaU2I or an SDTrans192. (Unfortunately no-one has yet been able to have both devices present at the same time and test under identical conditions. Maybe RayCtech will be the first one? ;-))
Yes I believe this (both your and my post) is OT as it does not have anything to do with the exaU2I unit.

I have received my exaU2I unit today, and I completed both my new music server and my new player PC yesterday.
Both are Hackintosh with dualboot (OSX 10.6.6 and Windows 7 in 64bit mode) and OSX defined both systems as Mac Pro 5.1...
The great fun is that the Hackintosh systems now works with both USB 3 and eSATA witch Macīs does not have..
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Old 22nd March 2011, 09:01 AM   #185
Raj1 is offline Raj1  United Kingdom
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Hi exa065,

If I use the exau2I in stereo mode with an LFE channel (2.1), is it possible to send all LF content to the LFE channel from software when playing back normal stereo? Reason I ask is because i have a pair of 300B monoblocks driving widerange speakers and a Linn Subwoofer - I'd like to send everything below 60Hz to the sub. I suppose I might need some kind of crossover software, but I'm wondering if there's any driver level configuration for the sub...

-Raja
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Old 22nd March 2011, 01:42 PM   #186
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The exaU2I unit are now connected and configured with Foobar2000 and ASIO drivers on a Windows 7 enterprise system..

Playing DXD gives a CPU load of totally 4 - 6%.

So far everything have functioned perfect
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Old 22nd March 2011, 02:23 PM   #187
Bunpei is offline Bunpei  Japan
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Default ES9018 DPLL Bandwidth Parameter Setting for I2S Input

I'd like to explain one more issue that those who connect the exaU2I devices to ES9018-based DAC modules may experience.
As the most of you may know, ES9018 has a "DPLL Bandwidth Parameter" setting. People agree that the lower parameter value setting will bring the better sound as long as the setting does not cause occasional "unlock" events.
As for S/PDIF input, "the lowest" value can be easily attainable for various transport units. On the other hand, as for I2S input, almost none transport can succeed in using the "the lowest" setting. This situation is well compiled and commented by glt in the following blog pages,
Buffalo II I2S Interface (Again) H i F i D U I N O
More on Sabre32 I2S Locking H i F i D U I N O

One effective way to mitigate the "unlock" events is selecting "the best default" value for the setting as explained in the article above.
Therefore, I'd like to recommend those who connect the exaU2I devices to ES9018-based DAC modules that they make it sure that they set "the best default" for the DPLL Bandwidth parameter.

I do not think this is a kind of defect of ES9018. One very reasonable guess is;
"The parameter value might effect 64 times severely in the case of I2S because DPLL function runs not on Word Clock but on Bit Clock for I2S."
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Old 22nd March 2011, 02:40 PM   #188
greggp is offline greggp  United States
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Quote:
Originally Posted by Raj1 View Post
Hi exa065,

If I use the exau2I in stereo mode with an LFE channel (2.1), is it possible to send all LF content to the LFE channel from software when playing back normal stereo? Reason I ask is because i have a pair of 300B monoblocks driving widerange speakers and a Linn Subwoofer - I'd like to send everything below 60Hz to the sub. I suppose I might need some kind of crossover software, but I'm wondering if there's any driver level configuration for the sub...

-Raja
There are plug-ins for both foobar2000 and J.River Media Center that will let you do this.
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Old 22nd March 2011, 02:56 PM   #189
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by RayCtech View Post
Playing DXD gives a CPU load of totally 4 - 6%.
So far everything have functioned perfect
It's great!

Are you using two exaU2I devices at the same time?
How about 4-channel/one device or 8-channel/two devices DXD surround play?
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Old 22nd March 2011, 02:59 PM   #190
exa065 is offline exa065  Canada
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Quote:
Originally Posted by Raj1 View Post
Hi exa065,

If I use the exau2I in stereo mode with an LFE channel (2.1), is it possible to send all LF content to the LFE channel from software when playing back normal stereo? Reason I ask is because i have a pair of 300B monoblocks driving widerange speakers and a Linn Subwoofer - I'd like to send everything below 60Hz to the sub. I suppose I might need some kind of crossover software, but I'm wondering if there's any driver level configuration for the sub...

-Raja
Raja,
I will create a new area on the exaDevices website where I am going to post sample configurations. I will present options for 2.1 playback for Foobar and J. River.
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