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Issue Buffalo III DAC dropouts with S/PDIF connection - Dropouts with S/PDIF Coax connection or Apple Airport Express
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***markus  
#1 Posted : Wednesday, March 1, 2017 4:32:23 PM(UTC)
***markus

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Hello together,

I have a very simple setup with just the Buffalo III DAC board (new one from this year) with the Tridents and the Toslink adaptor. S/PDIF connection is directly via D1, D2 - D8 are not connected. All DIP switches are in default position. Output is via two Sowter 3603 transformers to my preamp.

When S/PDIF Toslink is used from my CD player I have a brilliant output, very impressive. When I use S/PDIF Coax from my CD player I have constant irregular dropouts every few seconds. The same is when I use Toslink via Apple Airport Express - constant dropouts. Actually I am not sure if the effect is caused by the same problem. Maybe the signal from the Coax output is too weak and I should use an S/PDIF adaptor board therefore (like S/PDIF 4:1 MUX)? Maybe the DAC has a problem with the Airport clock signal?

Any advice or recommendation is highly welcome!

Regards,
Markus
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Brian Donegan  
#2 Posted : Monday, March 6, 2017 8:58:23 PM(UTC)
Brian Donegan

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Are you trying to connect the Coax S/PDIF directly to the D1 pin? This will not work, since the S/PDIF is consumer level (+/- 0.5V p-p), and the D1 requires TTL-level S/PDIF. We sell S/PDIF level-converters for this application.
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***markus  
#3 Posted : Tuesday, March 7, 2017 8:31:46 AM(UTC)
***markus

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Germany
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Thank you for the feedback Brian. That makes sense to me. We are talking of the single S/PDIF level converter, as mentioned in the integration guide, right?

Right now I have checked the Toslink adaptor again. It was configured for TTL level output. So this was the reason I assume, why it did not work properly, when directly connected to the DAC. Interestingly it worked fine with the output from my CD player.
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***markus  
#4 Posted : Tuesday, March 7, 2017 9:03:09 AM(UTC)
***markus

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Disappointingly the single s/pdif level converter is now (also) sold out in the shop. Actually I don't want to buy the S/PDIF-4 input board, with the need for an additional switching solution, as I am aiming for a very simple and lean setup. In fact my first choice would have been the Buffalo III/SE, but this is also sold out... What would be the second best choice?
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Brian Donegan  
#5 Posted : Thursday, March 9, 2017 2:27:16 AM(UTC)
Brian Donegan

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The single S/PDIF module is back in stock. Inventory count was wrong.

I expect a large batch of boards in the next few days. They will include BIIIse boards, so they too should be back in stock shortly.
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