[Bug 757258] gstalsasink: iec61937 (Non-linear PCM bitstreams) not correctly working

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=757258

--- Comment #22 from Arnaud Pouliquen <arnaud.pouliquen at st.com> ---
Extra information, than can also help...

Try "aplay -L" command on your console. And check you have some "hdmi",
"surround<xx>" or "spdif" defined.
these devices are specific alsa devices used by gstreamer to determine
pass-trough capability. for this Gstreamer tries to open an alsa device with
some AES<x> args. By default alsa hardware device (hw:X,Y) does not support it,
so you need to create alsa plugin devices.

you can have a look here on a way to define this kind of devices:
https://patchwork.kernel.org/patch/9703167/

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