On Sun, 25 Dec 2016 08:17:35 -1000, David Jones wrote: >I have a UCA202 and a powered USB hub. Connecting the 202 to the hub >gives me a noticeable power hum that doesn't happen when connected >directly to my laptop or to the hub without the hub PS connected. > >It's a cheap hub - but something to be aware of. Thank you, at least for ADAT usage this shouldn't matter. Actually the cause that an iPad can't connect to the PreSonus by USB, seems to be an USB current limit controlled by software [1]. A workaround already should be, to connect an unpowered USB hub. To cause less load for the battery, I will order a powered USB hub. On Sun, 25 Dec 2016 19:37:18 +0100, Christopher Arndt wrote: >Am 25.12.2016 um 19:17 schrieb David Jones: >> Connecting the 202 to the hub gives me a noticeable power hum > >You could always use DI boxes with a ground lift between the audio >output and your monitors or mixing desk. Or we chose our equipment for computer usage by keeping common computer audio issues in mind. One workaround would be S/PDIF by lightpipe or my choice ADAT. I don't want to mount audio cards inside the computer anymore, but I want to connect the ADCs and DACs completely galvanic isolated to the computer. When using ADAT with BNC WC it's not really completely galvanic isolated anymore, but ADAT works without WC, too. Regards, Ralf [1] https://forum.audiob.us/discussion/comment/300163/#Comment_300163 _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
