(Reported downstream at https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1269747): While on the source tree src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules references a config file for the native-instruments-traktor-audio2 device: ATTRS{idVendor}=="17cc", ATTRS{idProduct}=="041d", ENV{PULSE_PROFILE_SET}="native-instruments-traktor-audio2.conf" this .conf file is missing in modules/alsa/mixer/profile-sets/native-instruments-traktor-audio2.conf and thus not shipped. Reportedly [1] it had been working in the past, so it might be that it got lost after a rename or deletion? Otherwise, it can be generated from the .conf file provided in [1] [1] http://askubuntu.com/a/406160/9781
The file in question was added in 4.0, but it was not shipped in the release tarball (unintentional omission). The bug that caused the omission has been already fixed, and the 5.0 tarball will have the file.
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