Public bug reported:
there's an artificial spatilization when using usb multichannel audio
interface. in 12.10, in the "sound settings" window it did manifest itself as
"analog surround 7.1" profile, which is inadequate (i have 2.0 setup) and it
applies some bombastic fx (reverberation?) and virtual channels to the stereo.
in 13.04 i don't see the "analog surround 7.1" label anymore.
it also has no input.
there's only this fake surround profile available. seemingly it tries to put
all channels (with reverbs) into two physical channels if it detects it's a
multichannel device. and it happened specifically since 12.10, cause with 12.04
i had no problem. 12.04 had no "analog surround" profile forced on it.
there are some reverbed virtual channels (side l, side r and center) added to
outputs 1 and 2 (why?), and controls for balance and "distance" are entangled
(moving one moves the another). also i have NO analog surround 7.1 setup.
there are no other options.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-23.34-generic 3.8.11
Uname: Linux 3.8.0-23-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Sat Jun 1 11:39:06 2013
InstallationDate: Installed on 2012-02-23 (463 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=pl_PL.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Ultra failed
Symptom_Card: M-Audio RunTime DFU - Fast Track Ultra
Symptom_Type: None of the above
Title: [USB-Audio - Fast Track Ultra, playback] Playback problem
UpgradeStatus: Upgraded to raring on 2013-06-01 (0 days ago)
dmi.bios.date: 02/15/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 8JET41WW (1.35 )
dmi.board.asset.tag: Not Available
dmi.board.name: 50384MU
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:bvr8JET41WW(1.35):bd02/15/2012:svnLENOVO:pn50384MU:pvrThinkPadEdgeE220s:rvnLENOVO:rn50384MU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 50384MU
dmi.product.version: ThinkPad Edge E220s
dmi.sys.vendor: LENOVO
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring third-party-packages
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https://bugs.launchpad.net/bugs/1186512
Title:
[USB-Audio - Fast Track Ultra, playback] Playback problem
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