https://bugs.kde.org/show_bug.cgi?id=479619
Bug ID: 479619
Summary: Microphone's monitoring levels are extremely
non-linear
Classification: Plasma
Product: plasma-pa
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: applet
Assignee: plasma-b...@kde.org
Reporter: m...@ratijas.tk
CC: isma...@gmail.com, m...@ratijas.tk, now...@gmail.com
Target Milestone: ---
SUMMARY
Microphone's monitoring channel volume level does not scale linearly with
sensitivity. Normally, if you lover the output volume, the monitored volume
still ranges from 0.0 to 1.0 but UI scales it down to 0..volume range so that
it does not go out of slider's groove range. But the microphone apparently does
not work that way. The less sensitivity you set, the less will be the range of
monitored volume, and that scale is not even linear. For example, at 50%
sensitivity, I only get up to ~45% on volume monitor, and at 25% sensitivity it
won't go above 7%.
STEPS TO REPRODUCE
1. Play music that has constant volume on average, from a source that is
located at a fixed distance from your microphone.
2. Change microphone's sensitivity via Plasma Volume applet.
3. Observe the maximum value to which volume monitor (darker groove on the
slider) raises at peak volume levels.
OBSERVED RESULT
The lesser the sensitivity, the smaller the range of volume monitor.
EXPECTED RESULT
Volume monitor should stay in 0..1 range, regardless of sensitivity.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.0.80
KDE Frameworks Version: 5.249.0
Qt Version: 6.6.1
Kernel Version: 6.6.7-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2
pipewire: 1:1.0.0-2
pipewire-pulse: 1:1.0.0-2
pulseaudio-qt: 1.3-1
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