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Old 25th February 2011, 09:55 PM   #221
labjr is offline labjr  United States
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Quote:
Originally Posted by LeonvB View Post
Thunderbolt only supports the PCIe and mDP protocols. It's very much a dumbed down version of what initially was promised.

I highly doubt those are the only two protocols Thunderbolt will support. Maybe in the first computers it will only support this but I imagine Intel and Apple are thinking way ahead on this.


This is from the PDF on Intel's web site.

"For time-sensitive data, such as video and audio during creation
and playback, data transfers can be critical to the success of the
work. Thunderbolt technology was specifically designed with
video and audio applications in mind with inherently low latency
and highly accurate time synchronization capabilities.
For
 
Old 25th February 2011, 11:28 PM   #222
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Thunderbolt/Light Peak thread here
 
Old 26th February 2011, 08:31 PM   #223
Luke is offline Luke  New Zealand
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I think Apple have already adopted Thunderbolt, 10gb/s, crazy fast.
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Old 28th February 2011, 07:25 AM   #224
lauret is offline lauret  Netherlands
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Originally Posted by Russ White View Post
...

I will begin posting some board images to get user feedback soon. The board will be bus powered. It will be stereo. Also the idea is to keep it Opus sized if possible, so I won''t be adding any unnecessary stuff.

...
I was wondering where you are at with the boards. Any chance on posting them?
 
Old 1st March 2011, 07:36 PM   #225
NicMac is offline NicMac  Italy
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Hi Russ,
Will there be a galvanic I2S isolator on the board?
Cheers,
Nic
 
Old 1st March 2011, 10:09 PM   #226
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Russ has mentioned that he's had to completely redo the boards to work with the L2 chip. The software for the L2 is also different to the L1, which is taking some time to develop. From what I understand the L1 software was pretty much a reference design already produced by Xmos to demonstrate the chip, whereas the L2 is not. The bulk of the code should be similar, but working it to work with the different chip could be a bit of a pain, especially perhaps if the second core is being used.

I thought the swap was mainly based on the number of inputs/outputs that the L1 had, rather then needing the extra processing power.

From what I've gathered this swap was necessary to work with 8 channels?

Russ has also mentioned that there will be isolation and that it won't use optos, I'm interested to see what this is!
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Old 2nd March 2011, 01:48 AM   #227
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There's an L2 reference design as well as an L1 design. I'd be somewhat surprised if the L01A-LQ64 parts are IO bound, much less anything larger, though it does depend on how Russ has the board set up. See the schematics in the reference designs' hardware manuals.

Quote:
Originally Posted by 5th element View Post
Russ has also mentioned that there will be isolation and that it won't use optos, I'm interested to see what this is!
Caps would be the simple, cost effective choice. LVDS magnetics or similar would work too.
 
Old 2nd March 2011, 02:13 AM   #228
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The choice for L2 over L1 has to do with supporting more than 2 channels at 192khz or more.

As for the isolation, it is not caps. And it will not be on the USB board itself. It is a separate module.

But the more I research the more I think I will stick with stereo for now. I am still very much interested in this coming to fruition.
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Old 2nd March 2011, 02:20 AM   #229
labjr is offline labjr  United States
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Quote:
Originally Posted by Russ White View Post

As for the isolation, it is not caps. And it will not be on the USB board itself. It is a separate module.

Is it bigger than a breadbox?

Quote:

But the more I research the more I think I will stick with stereo for now. I am still very much interested in this coming to fruition.
So is everyone else.
 
Old 2nd March 2011, 02:33 AM   #230
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Quote:
Originally Posted by Russ White View Post
As for the isolation, it is not caps. And it will not be on the USB board itself.
Works for me, as I expect I'd be following the L2 with an ADAU1445.

Quote:
Originally Posted by Russ White View Post
I think I will stick with stereo for now.
Doesn't work for me as I have a requirement for six channels of ASIO input. 44.1 would be fine though---the 1445's not short of ASRCs. Any chance of offering say, stereo @ <up to some high rate>, 4 channels @ <up to some high rate> / 2, 8 channels @ <up to some high rate> / 4?
 

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