Hard pan left or right can cause "Darth vader effect"
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
pulseaudio (Ubuntu) |
Fix Released
|
Undecided
|
David Henningsson |
Bug Description
* Start two input streams
* In pavucontrol, pan one hard left and the other hard right
* Now at least of them starts to get a weird "bad horror movie" effect.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu6~
ProcVersionSign
Uname: Linux 3.2.0-14-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D3p: david 1978 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd4900000 irq 48'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:111d7605,
Controls : 22
Simple ctrls : 10
CurrentDmesg:
[ 16.928066] ADDRCONF(
[ 16.979317] ppdev: user-space parallel port driver
[ 18.971326] Adding 3998716k swap on /dev/mapper/
[ 27.095481] eth0: no IPv6 routers present
Date: Wed Feb 8 11:24:04 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120103)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/29/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68AZZ Ver. F.08
dmi.board.name: 1413
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 57.1D
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-
dmi.product.name: HP ProBook 4520s
dmi.sys.vendor: Hewlett-Packard
modified.
mtime.conffile.
summary: |
- Hard pan left or right can cause "Bad horror movie effect" + Hard pan left or right can cause "Darth vader effect" |
tags: | added: blocks-hwcert-enablement |
Note how it's trying to play back two waves simultaneously; every odd sample coming from one wave and every even sample coming from another.
And sometimes there are gaps where both waves change.