Tom, I've been following the Regen thread and wondering if it would make much of an improvement in front of my Tanly. Now you've gone and made me have to buy the thing!

can a few people comment on the best way to setup the U12 with jriver?
 
it seems to be picky...
 
is kernel stream, wasapi or asio?
and what specific settings?
why?

abartels said:

I noticed, both Tanly and Hydra-Z dont have output transformer for spdif and aes. Maybe they use optocouplers instead (as i did in my own dac design 20 years ago) . Could try that too in mx-u8 but again, it needs seperate galvanic isolated psu.

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Yes they use FPGA isolation - on the theory that the Pulse and Murata's don;t allow enough bandwith for high frequency pass through (176K and 192K - as the i2s has the even higher res passthroughs).  But I don;t think that's true -as all these DDC bridges easily pass 192K through spdif/aes.

bimmer100 said:

  can a few people comment on the best way to setup the U12 with jriver?
 
it seems to be picky...
 
is kernel stream, wasapi or asio?
and what specific settings?
why?

Click to expand...

J River has an OK write up the modes.  With Windows 7 and beyond I have stuck with WASAPI which is like kernel mode in that it bypasses the Windows audio mixer plus low overhead on CPU loading.  
 
http://wiki.jriver.com/index.php/Kernel_Streaming#Kernel_Streaming

dacladder said:

  J River has an OK write up the modes.  With Windows 7 and beyond I have stuck with WASAPI which is like kernel mode in that it bypasses the Windows audio mixer plus low overhead on CPU loading.  
 
http://wiki.jriver.com/index.php/Kernel_Streaming#Kernel_Streaming

Click to expand...

 
 
with the via usb 32 i've always used kernel streaming or wasapi
 
now with the amanero I use ASIO
 
and the U12 I use ASIO too.
 
the Via had no issues running with all options, no problems...but the U12 and amanero give error messages if they are not set up just perfectly.
 
I was curious if ASIO really is the best option like Jriver's writeup suggests..

I guess I like to know why, not just do it because they say too.
 

stuartmc said:

Tom, I've been following the Regen thread and wondering if it would make much of an improvement in front of my Tanly. Now you've gone and made me have to buy the thing!

Click to expand...

Sorry about that!    I hope your results are similar to mine..

I think REGEN SQ is getting even better now after 30 hours, seems the sound field is now more detached from the speakers and the acoustic space (front to back) between sound elements is more empty.
 
Anyway... one comment about expectation bias..  I have minor past experience working in live bands and recording, so some idea of what to listen for.. (in fact, I think understanding the music production process takes-away somewhat from the "magic" of the home audio experience because of the inclination to analyze ...).  I listen almost exclusively in the middle of the night, and my room is a treated one-person dedicated environment.
In the past couple years tweaking this computer audio stuff, listening results after a change have only gone maybe 50% of the time the way I would have expected...
 
This is fun stuff for sure !

It loses the PC lock, the driver seems to not fuction (all of them KS, ASIO, etc...). I have to close and reopen Foobar to get the connection reest.

I rigged a new heat sink and it's working well.  Except we have been getting crazy extreme lightning storms over our house the last few days - yesterday was esp bad.  I turn off and unplug every thing when they come.

Before the addition of the heat sinks it was unlocking every other song with the hot weather.

Ordered the Audio Breeze to give one a try.
 

 


The unit features these caps called "Panasonic's top audio filter caps Master XPO series".  But can't find these anywhere - Digikey and Mouser do not carry them.  Anyone run across them before?
http://www.ebay.com/itm/271948361421?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

rb2013 said:

The unit features these caps called "Panasonic's top audio filter caps Master XPO series".  But can't find these anywhere - Digikey and Mouser do not carry them.  Anyone run across them before?

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I looked at the Panasonic cap selector guide which only lists two character families for current caps.  XPO doesn't make sense.  Even searching "xpo capacitor" turns up nothing.

rb2013 said:

Ordered the Audio Breeze to give one a try.








The unit features these caps called "Panasonic's top audio filter caps Master XPO series".  But can't find these anywhere - Digikey and Mouser do not carry them.  Anyone run across them before?
http://www.ebay.com/itm/271948361421?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Click to expand...

I don't claim to know a lot about components and have little experience other than a project replacing caps out of PC speaker/amp a few years back. Those caps look like teapo brand wth the green color. Usually a bad brand from what I understand. I ran into companies actually relabeling caps. Fake names etc. I wonder if that's what is going on. As if they are really not Panasonic at all? I am just making an assumption. You would think the part would exist from the manufacture even if they discontinued it.
I have a ton of caps laying around that are apparently audio grade stuff. It would be nice to have them identified by someone who is educated with the components more than I am. I actually need to sell them to make space, so maybe someone on this forum would be interested in a good deal.

dacladder said:

  I looked at the Panasonic cap selector guide which only lists two character families for current caps.  XPO doesn't make sense.  Even searching "xpo capacitor" turns up nothing.

Click to expand...

Yes - that's what I found.  Or should I say didn't find.
 
Could these possibly be only available in Japan?
 
I love the Similic II's and the Nichicon Fine Golds - but always looking for a new, possibly better audio filter cap.
 
 
 
On another note comparing the linear regulators in the U12 vs the Audio Breeze.

The U12 uses the TI LM31702T which had this spec for noise:
http://www.ti.com/lit/ds/symlink/lm317.pdf
RMS output noise voltage f = 10 Hz to 10 kHz, TJ = 25°C 0.003 %VO - note the capping of the freq range at 10kHz -the AB's 2941 out to 100kHz.
And Ripple Rejection by frequency at -60dB to 10Khz but falling dramatically from there on out to -40dB at 100Khz then to -20 dB at 1MHz
 
The Audio Breeze uses the TI Military grade LDO LM2941 with noise specs:
http://www.ti.com/product/LM2941/datasheet/specifications#SNVS7705121
 The Ripple Rejection stays strong through the frequency range staying at -75dB to -65dB from 10Hz to 1Mhz
 
So it appears the Audio Breeze LDO is a much better one then the Gustard's.  This is obviously a very important element in the entire systems operation.

bimmer100 said:

I don't claim to know a lot about components and have little experience other than a project replacing caps out of PC speaker/amp a few years back. Those caps look like teapo brand wth the green color. Usually a bad brand from what I understand. I ran into companies actually relabeling caps. Fake names etc. I wonder if that's what is going on. As if they are really not Panasonic at all? I am just making an assumption. You would think the part would exist from the manufacture even if they discontinued it.
I have a ton of caps laying around that are apparently audio grade stuff. It would be nice to have them identified by someone who is educated with the components more than I am. I actually need to sell them to make space, so maybe someone on this forum would be interested in a good deal.

Click to expand...

I think I figured it out - they must be Sanyo's which is a wholly owned subsidary of Panasonic.  That green and gold color scheme rang a bell as I replaced some a while ago in my R2R DAC Project.  They are not marked Master XPO but SE series - they are green and gold in the same color scheme.
 

 
Sanyo was bought out by Panasonic some years go. Still very curious as to this elusive 'Master XPO' series.

Hey Goys, just started a new thread for those interested in vintage or current R2R DACs, hope to see you there!
 
http://www.head-fi.org/t/777597/vintage-current-r2r-dac-owners-discussion-insight-and-review-thread

This looks very good. Is there any retailer for this item?

kaboomooo said:

This looks very good. Is there any retailer for this item?

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See the Ebay link I posted. The only place I've seen it.