https://bugs.kde.org/show_bug.cgi?id=505653
Bug ID: 505653
Summary: Mono audio is only played to left side of stereo
outputs
Classification: Applications
Product: kasts
Version First 25.04.1
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: b...@mogwai.be
Reporter: b...@gmx.com
Target Milestone: ---
SUMMARY
Podcast episodes formatted as mono audio do not get played as dual mono on
stereo outputs; output is only sent to the left side of the audio output.
STEPS TO REPRODUCE
1. Download a podcast episode with mono audio, for example
https://feeds.soundcloud.com/users/soundcloud:users:545327328/sounds.rss (all
recent episodes I tested 16-06-2025 reproduced this)
2. Play podcast episode
OBSERVED RESULT
Audio only plays on left side of stereo outputs
EXPECTED RESULT
Audio plays on both sides of stereo outputs
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.9-300.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i7-8550U CPU @ 1.80GHz
Memory: 15.4 GiB of RAM
Graphics Processor: Intel® UHD Graphics 620
ADDITIONAL INFORMATION
Using Pipewire-Pulseaudio 1.4.4
I have reproduced this with both the onboard audio interface on my motherboard
and the USB audio interface of a Traktor Kontrol S4 Mk3. For the latter, I have
used pavucontrol to configure the profile to both "Analog Stereo 4.0 Output"
and "Pro Audio" and could reproduce the bug with both configurations.
Workaround is to manually make the connection from Kasts to the right side of
the stereo output with qpwgraph
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