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Looking for help understanding clock usage in my system

I should say up front that I don't completely understand how external clocks work (I understand the basics).  I'm currently using a LYH ock-2.  It's connected to a Gustard U-18 ddc, Gustard X-30 dac, and a Gustard N18 pro ethernet switch.  The LHY has three 10 mhz outputs in sine wave and three in square wave.  I've tried both and prefer square wave.

The ddc is connected to my Innous Zen Mkiii streamer by USB and connected to my dac via i2S.

I have recently purchased a Gustard U-26 ddc which should be a notable upgrade to the U-18 ddc.  Because the U-26 has a better clock, I'm wondering if I'll even need the LYH ock-2.  I'm going to try it both ways.

Here's my question....If I don't use the LHY ock-2 with the ddc and/or dac, would there be any point in using it at all?  It could be connected to the N18pro ethernet switch.  

Suggestions/advice would be appreciated.

sls883
sls883 OP
1,058 posts
 

@tutonunez Thank you for the reply!  I shot an email to Gustard to see what they suggest for the clock frequency.  They've been good about responding to emails.  If I get a chance, I'll try connecting to a pc.  

I don't know if it's correct, but I found the following information with Google:

For the Gustard U26 to work correctly with the Gustard X30 DAC over IIS (I2S), you should select the 128FS MCLK rate. While the U26 allows you to cycle through multiple rates, 128FS is the standard "native" master clock frequency for Gustard’s current flagship ecosystem (including the X30 and R30) to ensure proper synchronization and avoid playback errors.

sls883 OP
1,058 posts
 

Well, Gustard has replied already.  They suggested 22/24 Mhz.  I was mistaken when I listed 22/44 Mhz. 

 

So much for Google... 

sls883 OP
1,058 posts
 

Pretty impressive that Gustard replied within an hour and it was like 11:30 pm out there. 

lanx0003
1,939 posts
 

Congratulate, Op.  Simplicity is beauty. I also use the Zen 3 in my second rig, and its sound is romantic—yes, that’s the right word for it.

sls883 OP
1,058 posts
 

@lanx0003 thank you.  I thought about trying the ock-2 clock with the U26, but it sounds really good without it.  

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