I'm using this External USB Sound Card
and when enabling audio passthrough, the audio starts to stutter quite frequently. I've tested that card on my laptop and desktop pc, it works just fine. Tried all options in "Audio output" settings, nothing helps.
Comprehensive support for externally connected Hardware such as DVB's, USB Sound Cards etc will NOT be provided by LibreELEC.
Its impossible to provide such support when:
a) a developer does not have the actual Hardware.
b) the Linux Kernel used in AML devices is now pretty old compared to Intel or the RPi series of devices.
c) I frankly do not wish to get involved in such time consuming Hardware support for an old Linux Kernel.
Some individual users may have drivers already modded or backported. If that is the case and a clean patch is provided for the v3.14 C2 Kernel, then drivers can be incorporated.
HardKernel HiFi Shield and HK USB DAC support has already been pulled out of the v3.14 Kernel used for LE to get HD Audio Passthrough to work properly with Kodi. I doubt it will be going back in either, unless someone wants to sit down and mod. Kodi specifically for such support with working HDMI Audio passthrough.
LibreELEC is using pretty much the same Linux Kernel and drivers as Ubuntu on the C2.
If drivers or Hardware are not working properly then users need to open up a thread in the C2 Issues Sub-Forum and ask for driver support from HardKernel themselves OR sit down and compile their own modded LibreELEC from my GitHub sources.
If anyone has a working USB --->> S/PDIF setup then it would help if they can post up the Exact Hardware they are using with LE for the benefit of others. Open up a new thread and title it "USB --->> S/PDIF working Hardware with LE"