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Old 28th April 2013, 10:33 AM   #961
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Ok Russ. IŽll post the measures in the support forum of TPA but at this time seems to be a problem loading the page...
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Old 1st October 2015, 09:45 AM   #962
Luke is offline Luke  New Zealand
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Hi Russ, I have a buffalo 32S and I just bought a Wavio usb reciever for it. I have no problem configuring it for spdif, but whn I connect the i2s interface and switch off the spdif switch, it doesnt work. The green led goes out and there is no sound.

The 3 connections I use between the devices is:

source bit clock to DCK , source word clock to D1, Source data to D2. There is no ground output connection required between the two devices I take it, just the 3 connections?

thanks.
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Old 1st October 2015, 11:15 AM   #963
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Unless both modules share the same power supply, and therefore the power ground, you will need to connect a ground as well. You need a common ground reference for the I2S signals.
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Old 1st October 2015, 07:40 PM   #964
Luke is offline Luke  New Zealand
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Thanks Brian I wondered about ground, but there is no ground out from the Wavio i2S outputs. I may try the spdif out ground.
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Old 1st October 2015, 08:04 PM   #965
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Quote:
Originally Posted by Luke View Post
Thanks Brian I wondered about ground, but there is no ground out from the Wavio i2S outputs. I may try the spdif out ground.
I would bet there is only one digital output ground on the board (apart from an isolated output, which I think it might have as well).
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Old 1st October 2015, 08:16 PM   #966
ichiban is offline ichiban  United States
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Quote:
Originally Posted by Luke View Post
Thanks Brian I wondered about ground, but there is no ground out from the Wavio i2S outputs. I may try the spdif out ground.
I would guess you're using the Isolated I2S outputs.
If you look at J6 pin outs the row numbered 1 are all
isolated grounds.
If you're using the J2 through J5 outputs, each connector
has a center pin outputting the data and ground connector
surrounding them.
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Old 2nd October 2015, 09:30 AM   #967
Luke is offline Luke  New Zealand
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Hi Brian, actually I was using ground, I am not sure if the ground I was using is the same as isolated ground, continuity test should tell me, and I can just take a feed from isolated ground anyway. Ichiban, yes I'm using isolated I2S with no separate voltage. I better build another reg and try again. It is in the instructions, I just didnt realise I was using isolated i2s, Lucian has just informed me. I Should have this resolved soon. Thanks all.
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Old 3rd October 2015, 06:28 AM   #968
Luke is offline Luke  New Zealand
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Got it going, its quite an impressive dac, at first I liked the opus more so never really did much with it. The Opus is a very smooth and easy to listen to, I like it. But this buffalo is actually very good. My setup is different now, and it is a better performer. I noticed improvement with the I2S over the spdif in.
Would there be any advantage in the newer Buffalos Brian, or do you think this is as good? I quite like the idea of tweaking i/v and output stages.
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Old 3rd October 2015, 06:51 AM   #969
Luke is offline Luke  New Zealand
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And a pic of the unfinished product. Maybe I try a couple of shunts for analog stage, and try a lower voltage, the chips seem very hot. I might even try a discreet borbely buffer. I need to figure out the final config before I get a case. Brian and Russ, thankyou both again, I love your products
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Old 13th October 2015, 03:24 PM   #970
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Very cool! Thanks for the kind words. Kind neat to see a B32S in the wild.
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