Triode wrote: > The EHCI implementations which are host only ports on arm SoCs seem to > work ok - Touch, Cubox work for me; they all suffer with a restricted > TT, so need an external hub, but they do seem to be ok for async dacs > from what I can tell.
Yes, Cubox and Touch work fine for me with all 4 of the asynch UAC2 devices I tried. (I only have 2 now. I have a 'WaveIO' (http://luckit.biz/new/?tcp_product=waveio) which is based on the XMOS and capable of putting out I2S at up to 192k and an 'Amanero Combo384' (http://amanero.com/), I2S and DSD out, up to 384k. I use these with a variety of DAC's, mostly NOS, with any upsampling done on the server side.) Remind me about the need for an external hub. This is for Class 1 devices, where the controller doesn't deal with split transactions and the hub is needed between the host controller and the device? Triode wrote: > Let's see what JackOfAll's test show. [I was looking to get a > Beaglebone in the UK too and didn't find one, but as JackOfAll has > higher speed DACs than me its worth him testing.] I'm more than happy to forward it onto you as soon as I receive it. I don't wish to be pessimistic but I doubt that any ammount of tinkering........ (I suspect the issues will be present at lower sample rates, not just 192k / 384k, from what John was saying about a top refresh causing an audible "artifact".) And you are the USB expert! I can only imagine the ammount of time you put into EDO, backporting code and putting in fixes for devices that don't follow the spec. ;) ------------------------------------------------------------------------ JackOfAll's Profile: http://forums.slimdevices.com/member.php?userid=3069 View this thread: http://forums.slimdevices.com/showthread.php?t=97881 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
