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In Reply to: RE: PS/2 Mice & other recent interesting HW comments... posted by GStew on November 20, 2011 at 19:59:29
First, I had mentioned the EXA-U21 USB interface in my "Further Juli@ Follies" thread as what is likely THE hot USB->I2S interface for computer audio for a DIY'er. But there's another available that looks to also be very good and less expensive:
http://www.diyaudio.com/forums/digital-source/188902-xmos-based-asynchronous-usb-i2s-interface.html
and another that might also be a good bet:
http://www.diyaudio.com/forums/digital-source/185761-open-source-usb-interface-audio-widget.html
Then there is the K&K I2S interface I mentioned that uses PS Audio's HDMI-cable-based standard. Again, the coolest thing about it is that they make a sender that is designed to mount on the Juli@ digital section. Well there's now another option:
http://www.diyaudio.com/forums/twisted-pear/201106-introducing-bit-teleporter.html
It does provide some level of isolation between the source and receiver and there is no ground connection between them. This means it might work better than K&K's when used with a DAC other than K&K's RAKK DAC.
And the Twisted Pear people mention in that thread that they are also working on a USB->I2S interface that will likely compete in quality with the EXA-U21, so that will be another option in the near future.
Finally, a couple of questions...
Mihaylov, you have info on Juli@ clock upgrades on your website. It looks like you've done at least two upgrades, both of them changing just one of the clocks on the Juli@. Were the Juli@ cards still able to work for all of the standard sampling rates( 44/48/88/96/176/192) after the clock upgrade?
And for Rick McInnis, I remember you have a RAKK DAC. Did you upgrade to the latest MkIII version? If so, I have a couple of other questions for you.
Later!
Greg in Mississippi
Everything matters!
Follow Ups:
Greg,
Just want to let you know that stock Musiland 01USD sound slightly better than stock Julia@, when both were powered by the Mobo. If you like the SQ of Julia@, I think you would like Musiland 01USD too, and it has many rooms for modification. You have not considered Musiland probably because it has no I2S output, but I can tell you that I2S can be taken from the chip but it would involve very careful soldering work. I've done it on a Musiland 01US.
Stock Musiland may not sound best, but the chip it uses is similar to Hiface. Mine sounds very good after modification but I have nothing to compare to apart from Juila@ which remains unmodified. I bought it in China @USD55. It is a good choice for modification.
=Were the Juli@ cards still able to work for all of the standard sampling rates( 44/48/88/96/176/192) after the clock upgrade?=
- Yes, Greg. But the sampling rates 44.1/88.2/196.4 use internal stock clock resonator on the board of Juli and sampling rates 48/96/192 use external clock (I use LCAudio clock as world clock for Juli and CA DAC Magic due to that LCAudio clock have two outputs). My CA DAC Magic upsample any input signal to 96 KHz so I use only 96 output sampling in cPlay because I think that SoX in cPlay do upsampling better than DAC Magic.
Serge.
http://cmp2-mihaylov.narod.ru/
My cMP2: Windows XP SP2 Ru, Gigabyte GA-H55M-UD2H, Intel Core i3-530, Corsair CM3X160C9DHX 1GB, system drive - Transcend IDE FLASH MODULE TS2GDOM40V-S, ESI Juli@, full linear PSU, NAS - WD My Book Liv
and I am pleased with it though I have never compared it to anything else for reasons given numerous times. It makes different recordings sound different which is how I figure a component is working well. No glaze of unwanted continuity spread over every thing you listen to.
I think the I2S adapter that Dave made for the music server company is not for me. He even said I was better off with what I have. My main concern is the power supply. I think we can do better on our own.
I remain completely unconvinced by USB. I am sure it has got better than when I first began using it but it was such a revelation moving to JUL@ and that has not stood still either with what we have all learned.
Not that I would mind of it turns out to be the killer format. But I will wait for the ole preponderance of eveidence before making that change.
Have you had a chance to insert one into your system or are you where I am - next to impossible to insert; which im my case there is an addition to that: I could, but the set-up would be so different as to make the comparison worthless?
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