PulseAudio and M-Audio 2496: no analogue inputs available and apps get no sound

[Richard Corner]

Binary package hint: pulseaudio

richard@beast:~$ apt-cache policy pulseaudio
pulseaudio:
  Installed: 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
  Candidate: 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
  Version table:
 *** 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14 0
        500 http://mirror.csclub.uwaterloo.ca/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status
richard@beast:~$ uname -a
Linux beast 2.6.32-20-generic #29-Ubuntu SMP Fri Apr 9 20:35:00 UTC 2010 x86_64 GNU/Linux
richard@beast:~$ lsb_release -rd
Description: Ubuntu lucid (development branch)
Release: 10.04

When I first installed 10.04 there was no sound from the M-Audio 2496 card. I followed the instructions suggested by Alexandre Touret in response to bug #515874 (https://bugs.launchpad.net/ubuntu/+source/asoundconf-gtk/+bug/515874/comments/2). Adding those two lines to /usr/share/alsa/cards/ICE1712.conf got an analogue stereo output showing in the PulseAudio Volume Control, and I can now hear sound from my applications.

However, I cannot seem to get applications to receive audio from the analogue inputs on the M-Audio card. If I open the Envy24 Control Utility and go to the "Monitor Inputs" tab, I can see a response on the meters for H/W In 1 and H/W In 2, and I can verify by panning the microphone channel on my external mixer that the mixer's left output is connected to H/W In 1 and the right output to H/W In 2. But the sound from the card's hardware inputs does not seem to be available to applications.

I can see no analogue inputs in the PulseAudio Volume Control or PulseAudio Device Chooser. Do I need to add more lines to /usr/share/alsa/cards/ICE1712.conf to enable PulseAudio to recognize the card's inputs? The only input options I see are various digital (IEC958) inputs.

And does the patch at http://<email address hidden>/msg10824.html offer a more permanent solution? Is that in the works?

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
ProcVersionSignature: Ubuntu 2.6.32-20.29-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-20-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: M2496 [M Audio Audiophile 24/96], device 0: ICE1712 multi [ICE1712 multi]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: M2496 [M Audio Audiophile 24/96], device 0: ICE1712 multi [ICE1712 multi]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Card0.Amixer.info:
 Card hw:0 'M2496'/'M Audio Audiophile 24/96 at 0x1440, irq 18'
   Mixer name : 'ICE1712 - multitrack'
   Components : ''
   Controls : 50
   Simple ctrls : 28
Date: Mon Apr 12 00:57:55 2010
ProcEnviron:
 LANG=en_CA.utf8
 SHELL=/bin/bash
SourcePackage: pulseaudio
dmi.bios.date: 01/07/2009
dmi.bios.vendor: Intel Corp.
dmi.bios.version: DPP3510J.86A.0517.2009.0107.2203
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DP35DP
dmi.board.vendor: Intel Corporation
dmi.board.version: AAD81073-207
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrDPP3510J.86A.0517.2009.0107.2203:bd01/07/2009:svn:pn:pvr:rvnIntelCorporation:rnDP35DP:rvrAAD81073-207:cvn:ct3:cvr: