[abartels]

  Hi, I have a Gustard U12, and this past weekend tried bypassing the relay with a wire soldered between the legs.  It worked in that the Gustard powered up without 5 volt power with the bypass installed.  Unfortunately, it wouldn't play without 5 volt power.
 
My solution was to install an Aqvox USB connector which takes 5 volt power from an external source as substitute for the dirty power from the host computer.  One leg of a Keces power supply supplies the 5v power.
 
It sounds great!  
 
FYI, Aqvox will sell the cable without the linear power supply, if like me, you have one already.

This is very strange, it looks like the U12 does indeed need the 5V USB supply, and to be honest, that worries me a little bit,,,

 

[abartels]

 
+1 I just sold my Aqvox's I used with my Musiland USB 3.0's  Should have kept them.  I will order the cable only tomorrow - thanks for the tip!
 

Just order the E...... USB card we were talking about, you can power it external, and, i suppose it's cheaper than the cable 

 

[motberg]

  Hello Motberg,
 
I just contacted Gustard, they said X12 is their latest DAC.
 
Regards,

Hi and thanks for the check... much appreciated. I will be in the market for another DAC soon, and looking for something that will match up with the U12...
I just noticed a thread starting at http://www.head-fi.org/t/752522/gustard-amplifiers-and-dacs which has some good preliminary Gustard info in case anyone is interested in their other products.

 

[rb2013]

  This is very strange, it looks like the U12 does indeed need the 5V USB supply, and to be honest, that worries me a little bit,,,

The U12 has a protective circuit that disables the receiver if it detects a loss of connection (someone trying to hot USB cable swap?! or accidental disconnect).  TO reset the relay you need to unplug the U12 then replug.
 
So likely it uses the USB power to 'detect' connection.  Versus a software/PC setting issue.
 

Smart switch, USB has a current interface to boot. Interface with the computer switch and switch machine (computer to be set off USB power failure), or unplug the USB cable directly to the shutdown 

 

[conquerator2]

 
The U12 has a protective circuit that disables the receiver if it detects a loss of connection (someone trying to hot USB cable swap?! or accidental disconnect).  TO reset the relay you need to unplug the U12 then replug.
 
So likely it uses the USB power to 'detect' connection.  Versus a software/PC setting issue.
 

I think that's the problem I am experiencing... Except my USB cable is a regular one 

 

[bwmarrin]

 
The Aqvox is a neat little unit.  Linear PS that replaces the power feed from the PC using a special adapter.  They're not cheap though.
 
http://www.aqvox.de/usb-power_en.html

 
Yeah I read about that.  The Wyrd provides a Linear power as well.  So that makes me wonder what the pro/con's between the brands would be.  The Wyrd also does some reclocking so there's definitely some other differences to wonder about.

 

[rb2013]

   
Yeah I read about that.  The Wyrd provides a Linear power as well.  So that makes me wonder what the pro/con's between the brands would be.  The Wyrd also does some reclocking so there's definitely some other differences to wonder about.

I believe the Wyrd is supposed to work as a galvanic isolator as well - not sure which transformers they use.  To help with hum and GL issue.

 

[bussola]

Sorry,but I need to repost this to get an answer, you guys seems ignoring..
 
Hello, I received my gustard u12 this morning and i have been really enjoying the sound it creates with my hugo via coaxial.
Would like to ask you some questions,hope you can answer me and that they are of general interest:
Does the coaxial output support a 384 kHz stream?I am able to make the led of the gustard to show this rate , but the hugo does not show any light or sound,almost like the data cannot pass in the cable i'm using(20 $ cable)
 
Does the toslink output support a 192 kHz data signal?Cause the hugo can get that sample rate as an input and also by other devices, but I am only able to stream a 96kHz signal(problably because I am using a really cheap cable,as I read on another forum)
 
Thank you very much

 

[MINORISUKE]

  Sorry,but I need to repost this to get an answer, you guys seems ignoring..
 
.....
 
Does the toslink output support a 192 kHz data signal?
.....
 
Thank you very much

Yes, my DAC accepts 192kHz/24bit signal via TOS-link.  I checked it for you just now.  The optical cable I used is a cheap one from Sony.
In terms of 384kHz coaxial, it did not work with my DAC (up to 384kHz via I2S capable), nor via AES/EBU.

 

[bussola]

  Yes, my DAC accepts 192kHz/24bit signal via TOS-link.  I checked it for you just now.  The optical cable I used is a cheap one from Sony.
In terms of 384kHz coaxial, it did not work with my DAC (up to 384kHz via I2S capable), nor via AES/EBU.

 
Thank you for the reply.
Probably my toslink cable has some limitations, cause the hugo dac can take a 192kHz via Toslink.
In regard of the coax stream,I'd like to know if the gustard itself support 384kHz via coax,cause the hugo can accept a coax input at this rate.I cannot find this information anywhere on the internet

 

[abartels]

   
Thank you for the reply.
Probably my toslink cable has some limitations, cause the hugo dac can take a 192kHz via Toslink.
In regard of the coax stream,I'd like to know if the gustard itself support 384kHz via coax,cause the hugo can accept a coax input at this rate.I cannot find this information anywhere on the internet

Toslink AND Coax are both SPdif (Sony Philips Digital InterFace).
 
The SPdif spec is ONLY upto 24/192. So, your dac will NEVER accept digital signals over coax or toslink that have a higher samplerate then 192Khz.
 
AND
 
Most Toslink receivers and transmitters accept samplerates upto 96 Khz. Maybe just look in the specs of your dac if it is supposed to work on 24/192 on toslink.

 

[MINORISUKE]

  Toslink AND Coax are both SPdif (Sony Philips Digital InterFace).
 
The SPdif spec is ONLY upto 24/192. So, your dac will NEVER accept digital signals over coax or toslink that have a higher samplerate then 192Khz.
 
AND
 
Most Toslink receivers and transmitters accept samplerates upto 96 Khz. Maybe just look in the specs of your dac if it is supposed to work on 24/192 on toslink.

Chord Hugo TT is said to accept 384kHz/32-bit via BNC input.  I am not sure whether it is still called S/PDIF.

 

[MINORISUKE]

Latest XMOS USB audio driver: 2.23.0?
Does anybody have an idea if there exists a later version for U12?  WaveIO has a dedicated driver 2.24.0.

 

[bussola]

  Toslink AND Coax are both SPdif (Sony Philips Digital InterFace).
 
The SPdif spec is ONLY upto 24/192. So, your dac will NEVER accept digital signals over coax or toslink that have a higher samplerate then 192Khz.
 
AND
 
Most Toslink receivers and transmitters accept samplerates upto 96 Khz. Maybe just look in the specs of your dac if it is supposed to work on 24/192 on toslink.

Yes,but here the specs for the chord hugo mobile
Optical TOSLink 24-bit/192kHz-capable
RCA coaxial input 24-bit/384kHz-capable
Are they referring to a non Spdif coax connection?who knows

 

[bussola]

 
Chord Hugo TT is said to accept 384kHz/32-bit via BNC input.  I am not sure whether it is still called S/PDIF.

BNC should be a different type of connector,rather than rca coax,the cable is the same