badboygolf16v wrote: 
> I was looking for some advice on USB DAC setup using SoA on a Wandboard
> Quad.
> 
> I am trying to use a Wandboard Quad with Squeezelite via USB into an
> Epiphany Acoustics EHP-O2Di (NwAvGuy ODAC). I'm using the USB host port
> on the Wandboard and the setup only works with a USB hub in the middle.
> 
> 
> The Wandboard works fine with no hub into a Benchmark DAC1 USB.
> 
> Does anyone know if there is any way to avoid using a hub with the O2Di?
> Or is this a hardware issue (power requirements?) that cannot be
> resolved in any other way?
> 
> Thanks

I seem to remember this sort of thing being discussed in the past, e.g:
Could the USB input of an Audiolab M-DAC be used without a USB HUB when
connected to a Wandboard.

IIRC the problem was about hardware which supported "Asynchronous mode",
but was *not *USB Audio Class 2.  A quick look at the  Epiphany
Acoustics EHP-O2Di would suggest it uses the same USB SA9023 receiver
chips as the E-DAC 24 bit Miniature USB DAC.  This receiver chip is
supposedly Asynchronous, but is not USB Audio Class 2 compliant.  

So, I think the answer is there is no way to avoid using the hub with
the O2DI.


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