[pulseaudio-tickets] [Bug 87656] native-instruments-traktor-audio10.conf is not correct

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87656

--- Comment #15 from Tanu Kaskinen <tanuk at iki.fi> ---
Owen, in the first message you say that previous NI cards used separate stereo
subdevices, but the new Audio 10 card uses a single 10-channel device. To me it
sounds unlikely that PulseAudio would have a configuration file for Audio 10
that wouldn't have worked when the file was initially written, so probably
something changed at some point. Perhaps just the kernel driver changed, or
perhaps a new revision of the hardware works differently. In either case, it's
problematic if PulseAudio can't distinguish between two different kernel driver
versions or between two different hardware revisions, because there will always
be some combination that will not work. If it's just a kernel driver change,
though, then it's better to support the new version rather than the old one.

According to the "aplay -L" output there are the normal alsa devices like
"front" and "surround40" available. Do those work? If you don't know, here's
how to test them:

    pasuspender -- speaker-test -Dfront:T10 -c2 -FS32_LE
    pasuspender -- speaker-test -Dsurround40:T10 -c4 -FS32_LE

If those work, then the special profile set file for Audio 10 is not needed at
all anymore, unless we really want things like multiple stereo sinks.

You asked how the card can be split to multiple stereo sinks. The answer is
that the profile set configuration doesn't support that. It is possible to use
module-remap-sink, but that's cumbersome with hotpluggable cards.

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