USB to SPDIF or I2S convertor

[ttan98]

Hi,

There are currently 3 options to convert USB to SPDIF/I2S which are based on:

1. TE7022
2. CM6631 or CM6631A
3. XMOS

The 1st one is considered a little old and the max speed limited to 96kbit/s. The last 2 chipsets, CM6631/A and XMOS are current chips used the current crop of convertor designs. I bought a convertor based on CM6631 and I found it to very good at the same time it is quite cheap.

I don't know the differences(technically) between the CM6631 and XMOS chipsets, my query is that, is there a clear/distinct advantage, e.g. jitter spec. of the XMOS chipset over the CM6631/A? If so please explain. If I am getting a new convertor should I buy a convertor based on XMOS or CM6631A? Thanks.

 

[Shaun]

Hi,
I bought a convertor based on CM6631 and I found it to very good at the same time it is quite cheap.

Which converter did you get? Could you provide a link, please?

 

[jorgovanko]

I bought a convertor based on CM6631 and I found it to very good at the same time it is quite cheap.

Please provide a link to converter. Thanks

 

[wa2ise]

I built a kit similar to this one, and it worked nicely: DDDAC1543 MK2, circuit description and Construction

 

[GTrenchev]

I bought this XMOS :
http://www.raspyfi.com/wp-content/uploads/2013/05/xmos.jpg

But it seems it's not not sale anymore.Nevertheless, it's a great chip if you want no-frills i2s output.It's also very compact.

 

[korben69]

One more option for USB -> I2S conversion
I've got one aside for a while, IMHO good results :
http://www.diyaudio.com/forums/vendors-bazaar/216474-usb-i2s-384khz-dsd-converter.html
You could add USB isolator too : http://www.diyaudio.com/forums/vendors-bazaar/228590-30-free-amanero-isolator-bare-pcbs.html
More functions, USB isolator + reclocker : http://www.diyaudio.com/forums/group-buys/227502-amanero-isolator-reclocker-gb.html

Hope this helps.
Regards

Phil