COD - Current Output DAC - Page 15

staki · 22nd December 2012, 04:26 PM

Thanks for the answer Zero Cool !

Which is the best cable ? Bare copper wire ? Mini coax ?

Zero Cool · 22nd December 2012, 04:40 PM

The master clock and bit clock lines seem to be the most sensitive to cable type. I used mini coax for the master clock lines and ribbon cable for everything else
Grounding is very important too!

staki · 22nd December 2012, 04:51 PM

Shouldn't each connection have its own ground line ?
But on the COD board there is only one ground pad........

Zero Cool · 22nd December 2012, 05:19 PM

Quote:

Originally Posted by staki

Shouldn't each connection have its own ground line ?
But on the COD board there is only one ground pad........

I connected all I2S grounds at the same connection

staki · 22nd December 2012, 08:11 PM

Ok, I've just ordered two COD modules. Can't wait to assembly them with my WaveIO USB-i2s module, i/v active stage and power supplies, and start listen to some good music !

mavallarino · 17th March 2013, 09:11 PM

Hi all,
I'm attempting to connect the TP 4:1 MUX receiver to the COD.
For the 'MCK' connection on the MUX where does this go on the COD, to the 'SCK' terminal? Does SCK mean system clock, is it necessary?
Thanks in advance and excuse the digital ignorance!

mavallarino · 23rd March 2013, 10:45 AM

okay, I'm assuming that MCK = SCK (master/system clock respectively).

even hooking these together I'm still not getting the lit lock led.

I'm using an older CD transport that may not do more than 44khz but I'm confident this isn't the problem since the same transport works well and without issues on other dacs.

Voltage is ok and checks out. 7.5VDC to the 4:1 MUX and 5.5VDC to the COD (DAC) and I'm only using s/pdif coax from the transport since I don't have anything else. Furthermore the switch on the MUX is switched "closed" for enabling input '1'.

Is there a recommended procedure in troubleshooting the MUX?

Russ White · 23rd March 2013, 12:09 PM

Yes - SCK is equivalent to MCK.

Any chance you can try a different SPDIF source? Also please move this to the support forum if you can and provide some pictures if possible.

mavallarino · 02:48 PM

is there a specific forum for this combination? All I had found was this thread and another for the MUX, but nothing caught my attention for a "support-specific" thread so I guess I high-jacked this one.

Photos shortly following.

BrianDonegan · 23rd March 2013, 04:04 PM

Quote:

Originally Posted by mavallarino

is there a specific forum for this combination? All I had found was this thread and another for the MUX, but nothing caught my attention for a "support-specific" thread so I guess I high-jacked this one.

Photos shortly following.

Here: no lock - S/PDIF 4:1 MUX/Receiver - Twisted Pear Audio Support

22nd December 2012, 04:40 PM	#142
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	The master clock and bit clock lines seem to be the most sensitive to cable type. I used mini coax for the master clock lines and ribbon cable for everything else Grounding is very important too! __________________ It's not about what you can BUY...It's about what you can BUILD!

23rd March 2013, 12:09 PM	#148
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Yes - SCK is equivalent to MCK. Any chance you can try a different SPDIF source? Also please move this to the support forum if you can and provide some pictures if possible. __________________ Less pulp more juice Twisted Pear Audio.

23rd March 2013, 02:36 PM	#149
mavallarino diyAudio Member Join Date: Oct 2006	is there a specific forum for this combination? All I had found was this thread and another for the MUX, but nothing caught my attention for a "support-specific" thread so I guess I high-jacked this one. Photos shortly following. Last edited by mavallarino; 23rd March 2013 at 02:48 PM.

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22nd December 2012, 04:26 PM	#141
staki diyAudio Member Join Date: Dec 2007 Location: 2504 Biel	Thanks for the answer Zero Cool ! Which is the best cable ? Bare copper wire ? Mini coax ?

22nd December 2012, 04:51 PM	#143
staki diyAudio Member Join Date: Dec 2007 Location: 2504 Biel	Shouldn't each connection have its own ground line ? But on the COD board there is only one ground pad........

22nd December 2012, 08:11 PM	#145
staki diyAudio Member Join Date: Dec 2007 Location: 2504 Biel	Ok, I've just ordered two COD modules. Can't wait to assembly them with my WaveIO USB-i2s module, i/v active stage and power supplies, and start listen to some good music !

17th March 2013, 09:11 PM	#146
mavallarino diyAudio Member Join Date: Oct 2006	Hi all, I'm attempting to connect the TP 4:1 MUX receiver to the COD. For the 'MCK' connection on the MUX where does this go on the COD, to the 'SCK' terminal? Does SCK mean system clock, is it necessary? Thanks in advance and excuse the digital ignorance!

23rd March 2013, 10:45 AM	#147
mavallarino diyAudio Member Join Date: Oct 2006	okay, I'm assuming that MCK = SCK (master/system clock respectively). even hooking these together I'm still not getting the lit lock led. I'm using an older CD transport that may not do more than 44khz but I'm confident this isn't the problem since the same transport works well and without issues on other dacs. Voltage is ok and checks out. 7.5VDC to the 4:1 MUX and 5.5VDC to the COD (DAC) and I'm only using s/pdif coax from the transport since I don't have anything else. Furthermore the switch on the MUX is switched "closed" for enabling input '1'. Is there a recommended procedure in troubleshooting the MUX?

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