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[g0ukb <1498129@xxxxxxxxxxxxxxxxxx>]

What needs to be done to unexpire this? I have exactly the same problem.
Like the OP I have confirmed that aplay plays fine to the iec958 device
but pulseaudio seems to alias it's iec958 oputput to analog.  I also
have a colleague with the same card so this bug affects at least 3 of
us. My card is the Xonar U7 Echelon Edition which I believe is exactly
the same card as the OP, just different packaging and curiously a
different alsa-name:  Xonar U7 Echelon Ed.

I don't really understand alsa/pulseaudio config etc but happy to
product/hack config files etc. to test any ideas.

Since aplay to hw:3,1 worked for me I wondered if  Raymond's comment
about iec958 needing to be first device was the problem and simply
tried editing my USB-Audio.conf to be :

# If a device does not use the first PCM device for digital data, the device
# number for the iec958 device can be changed here.
USB-Audio.pcm.iec958_device {
	# "NoiseBlaster 3000" 42
        "Xonar U7 Echelon Ed." 1

This made no difference (but then I did say I don't understand
alsa/pulseaudio so was probably stupid)

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1498129

Title:
  Asus Xonar U7 S/PDIF output not recognized by pulseaudio

Status in alsa-driver package in Ubuntu:
  Expired

Bug description:
  The external USB audio card Asus Xonar U7 is capable of both analog and digital output.
  ALSA name for the digital (S/PDIF) output is hw:1,1, and it is listed in aplay -l output, and aplay can output to it:
  aplay -D plughw:1,1 sample.wav. So, direct alsa sound works fine.

  However, pulseadio does not recognize the digital output of Xonar U7,
  it offers only analog output.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: pulseaudio 1:4.0-0ubuntu11.1
  ProcVersionSignature: Ubuntu 3.13.0-63.103-lowlatency 3.13.11-ckt25
  Uname: Linux 3.13.0-63-lowlatency i686
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  aoand      3756 F.... pulseaudio
   /dev/snd/controlC0:  aoand      3756 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Sep 21 21:29:54 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-02-20 (1674 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007.1)
  SourcePackage: pulseaudio
  UpgradeStatus: Upgraded to trusty on 2014-05-19 (490 days ago)
  dmi.bios.date: 11/29/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7WET71WW (3.21 )
  dmi.board.name: 7448CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7WET71WW(3.21):bd11/29/2012:svnLENOVO:pn7448CTO:pvrThinkPadX200Tablet:rvnLENOVO:rn7448CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 7448CTO
  dmi.product.version: ThinkPad X200 Tablet
  dmi.sys.vendor: LENOVO

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