Straight from the eBay page [link]

I have to congratulate this Mr. diyinhk. He can non only produce designs with such speed, but can somehow price them so amazingly low. This new module is priced at $59.95 -Can’t resist not getting it!



  1. Latest XMOS chip that uses 48MHz oscillator (rather than the 13Mhz used by the older XMOS chip for the USB interface) – I believe this is the XS1-U chip with built-in USB interface [link]
  2. 6.5uVrms Ultralow noise LDO. -The TI LP5900 [link]. I believe (the 6-legged chip next to the USB connector).
  3. Solid ground plane (a must for high speed digital circuit)
  4. No Via in active circuit (via inductance always create jitter problem)
  5. FOX ultra low ppm oscillators and Murata capacitors sourced from Digikey USA. -The two Xpresso 22.579 2MHz and 24.576 MHz clocks. They are of different size which reminds me of user complaining when some of the Hiface interfaces were built with the smaller size oscillators. But the industry is moving away from 5×7 mm to 3×5 mm and there is no way back.
  6. Gold plated USB connector (Molex, FCI, or other -depends on stock)
  7. Compact size 50mm x 30mm. -That is even smaller than the Amanero which is 30×70 mm approx.
  8. Module is USB powered but the diyer expert can remove FB1 and use an external 5V PS to CN1 (warning: over-voltage or reverse-voltage can damage the XMOS chip immediately. Any modification will void item warranty)
  9. Can optionally install series resistor to I2S lines (by cutting the traces)



Looks like the first USB interface using the latest generation XMOS chip (XCORE USB) with built-in USB.


  1. April 12, 2013 at 08:11

    I’m quite impressed with diyinhk release rate too. looking forward for your impression …
    I’m not very familiar with xmos xcore, any ideas if it is compatible with DxD via stock firmware or flashing ?
    I believe this is is similar with the latest Matrix X-Sabre which is DxD compatible ?

  2. endy
    April 16, 2013 at 11:11

    How do you compare it to diyinhk’s CM6631 usb receiver?

    • BlgGear
      April 16, 2013 at 16:32

      I just received it and have not yet tested it with the DAC. Functionally the new board supports up to 384K sample rate.

  3. Jorgi
    June 18, 2013 at 13:27

    Is this PCB actualy XMOS-based Asynchronous USB to I2S interface?


    • BlgGear
      June 18, 2013 at 17:54

      Yes, this board and the CM6631A board has been “discontinued” by the builder (diyinhk), but he will come up with newer and better boards. He sells his stuff on eBay

  4. Jorgi
    June 19, 2013 at 14:22

    Thx for info. Waiting for that🙂


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