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Old 15th December 2010, 11:36 PM   #1051
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Barrows,

There are lots of ways to do things wrong with both I2S and SPDIF that can lead to data errors or even missing samples etc. It really depends on the implementation at the source.

"bit perfect" is only as perfect as the mechanism to encode it. There is an analog side to every digital circuit.
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Old 16th December 2010, 12:15 AM   #1052
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Really, I am not an ESS apologist, and I won't be put in that position. It is their baby I will let them extol its virtues. If you think they have something to prove you should take it up with them.

For my part I have some really good SPDIF sources, and some really bad ones that I test with.

The bad ones always sound bad and even require DPLL changes to work. Some of the good ones sound awesome on the ESS DAC but really not so great on a more conventional DAC. Why? Well because if you take the clock recovery out of the equation all that is left is good music. For many DACs this is not an option unless you ASRC. But it going to be hard to do ASRC as well as ESS has here.

To me the differences between I2S and SPDIF input are so minimal that there is no sense in arguing over them. The beautiful thing is, you have a choice!

Hmmm, and we have not even touched on DSD. Which I really like BTW.
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Old 16th December 2010, 09:35 AM   #1053
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I'm waiting for this guys! I hope Russ will develop Linux/ALSA drivers for such a device, this would be a great.

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Russ has made some very confident sounding statements about the forthcoming USB interface board. I trust that he is working very hard to make this interface a state of the art solution, with very little compromise in its design.
I am very much looking forward to trying the new interface when it is available, as I expect it will raise the performance of the B-II up another notch. (and I am already experiencing great computer audio perfromance with my B-II, via a Wavelink USB-SPDIF converter).
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Old 19th December 2010, 07:21 PM   #1054
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Omg this weeks boards went off so quick :O

Btw what is considered a good spdif source?
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Old 21st December 2010, 12:27 PM   #1055
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Hi Russ,

I was one of the lucky and fast one to buy the Buffalo in the last run. To be quick I just put the Buffalo modules in the order, but I would like to ask you if it is possible to add more items before the shipment.

Additionally, I am very interested in your development of the USB module. Do you have an idea of how big the module will be and if it will need a separate power supply, so I can leave enough space in the chassis.

Thanks,

Davide
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Old 21st December 2010, 03:46 PM   #1056
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Default Nikon...

check the USB thread, you will find the answers there.
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Old 22nd December 2010, 08:35 AM   #1057
WDYSUN is offline WDYSUN  Italy
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there is no USB stuffs in Twisted Pear - diyAudio

which thread you mean?

best
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check the USB thread, you will find the answers there.
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Old 22nd December 2010, 12:37 PM   #1058
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Quote:
Originally Posted by WDYSUN View Post
there is no USB stuffs in Twisted Pear - diyAudio

which thread you mean?

best
Pietro
TPA - USB Transport
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Old 27th December 2010, 12:16 PM   #1059
Marek is offline Marek  Poland
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I got a question about Vref. Is there Vref pin available on some pad on BuffaloII PCB?
And If I want to use passive I/V in "current mode" with resistor (eg 5ohm) should I connect resistors between diff outputs and GND or diff and Vref (offset problem)?
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Old 27th December 2010, 08:53 PM   #1060
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No there is no VREF on the Buffalo II nor the ES9018. It is always referenced to AVCC.

If you use any resistor the DAC will not really be in current mode and performance will suffer. Yes even 5 ohms.

If you want you could create you own AVCC/2 voltage for you I/V stage. That is up to you.

You can also simply connect your resistor directly to GND there is no problem in doing this.

All of the inputs and outputs are clearly marked.
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