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-   -   XMOS-based Asynchronous USB to I2S interface (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface.html)

flocchini 29th November 2011 05:33 PM

Synchronous Clocking
 
Can someone point to a place where I can learn about synchronous clocking?
I would like to set my XMOS board and Buffalo II up to do this and let my ears be the judge.

Thanks

The more I listen to my set-up with the XMOS board the more I like it. I'm asking myself - "did I hear that before?" Lucian - great job

barrows 29th November 2011 05:53 PM

Flo: do a search of the TPA B-II and B-III forums. You will find everything you need with a little research.

Lorien 29th November 2011 06:06 PM

rol, can you be so kind to provide details on how you wired your WaveIO card to Buffalo DAC?
Thank you,
L

flocchini 29th November 2011 07:14 PM

Quote:

Originally Posted by barrows (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface-post2799490.html#post2799490)
Flo: do a search of the TPA B-II and B-III forums. You will find everything you need with a little research.

Will do

triode_al 29th November 2011 07:18 PM

Quote:

Originally Posted by flocchini (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface-post2799592.html#post2799592)
Will do

and do please report back!!!

flocchini 29th November 2011 07:26 PM

Quote:

Originally Posted by triode_al (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface-post2799598.html#post2799598)
and do please report back!!!

I do move move slow these days (you young guys move at the speed of light) but I will report what I find.

I did notice in the Buff III integration manual the use of synchronous clock is discouraged. Just a note but not a deterrent.

Best

labjr 29th November 2011 07:30 PM

Quote:

Originally Posted by flocchini (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface-post2799605.html#post2799605)

I did notice in the Buff III integration manual the use of synchronous clock is discouraged. Just a note but not a deterrent.

Best

Maybe because it's more difficult to implement. However, I would think it's the best way to go if you're up to the task.

flocchini 29th November 2011 07:31 PM

Quote:

Originally Posted by Lorien (https://www.diyaudio.com/forums/digital-line-level/188902-xmos-based-asynchronous-usb-i2s-interface-post2799511.html#post2799511)
rol, can you be so kind to provide details on how you wired your WaveIO card to Buffalo DAC?
Thank you,
L

In my set-up I used micro BNC on the WaveIO side and bare wire on the BII

Data and GND were obtained from same cable and connected to D2 and GND on BII

BCLK was connected to DCK

LRCK was connected to D1

Buffalo was set to accept I2S

Installed Drivers Lucian sent on my MAC


Best

reo 29th November 2011 08:22 PM

Do remove the Trident from the Dac's VDD_XO circuit. If you don't have the Trident on your Dac then simply remove the ferite bead that controls the VDD_XO which is located on the underpad (L8)mmm not sure it's that one so follow the trace.... which should disconnect the onboard Crystek .

Now locate your R17 pads on buffaloII ? when looking at the Dac with the twisted pear logos facing upright., you locate the right pad from the 2 R17pads to connect your MCLK live wire only, from WaveIO, then you use the ground wire from your MCLK and connect to left pad of R17 .All your I2S connections from WaveIO to buffaloII will be as short and similar lenght as possible .
hope that helps to synchronize and do convey your results please .
regards
rol

Lorien 29th November 2011 08:53 PM

Thank you rol!
L


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