[Bug 742271] New: [bisected] Severely distorted sound on changing volume of stream
GStreamer (bugzilla.gnome.org)
bugzilla at gnome.org
Sat Jan 3 09:23:45 PST 2015
https://bugzilla.gnome.org/show_bug.cgi?id=742271
GStreamer | orc | 0.4.23
Summary: [bisected] Severely distorted sound on changing volume
of stream
Classification: Platform
Product: GStreamer
Version: 0.4.23
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: orc
AssignedTo: gstreamer-bugs at lists.freedesktop.org
ReportedBy: a.c.kalker at gmail.com
QAContact: gstreamer-bugs at lists.freedesktop.org
CC: ds at schleef.org
GNOME version: ---
Created an attachment (id=293666)
--> (https://bugzilla.gnome.org/attachment.cgi?id=293666)
Arch linux build script for building orc from git
Using Arch Linux x86_64 with pulseaudio 5.0-1, orc 0.4.23-1, I'm getting
severely distorted audio after I change the volume of a stream, even by just a
little.
Steps to reproduce
$ pulseaudio -k
$ # restart pulseaudio if it doesn't start automatically on first use
$ man man | espeak # Generate some audio, varying dynamics.
In pavucontrol, move the volume slider for the espeak application stream just a
little.
Actual result: severely distorted audio (almost like white noise, barely
discernible speech from espeak).
Expected result: clear audio for reasonable volume settings.
The problem does not occur for orc 0.4.22 .
Building an Arch linux package of orc from git[1], I was able to bisect the
problem to this first bad commit:
http://cgit.freedesktop.org/gstreamer/orc/commit/?id=a62eefc1dc716046d99aacec208cfdfe42dadb34
Suspecting a breaking ABI change (because of the added struct members), I
rebuilt and reinstalled pulseaudio[2], but to no avail, sound remains
distorted.
[1]: See attached PKGBUILD.orc-git
[2]: See attached PKGBUILD.pulseaudio
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