Sound problem with flac files

Hi,
I am using Kubuntu 24.04LTS. I have some .flac files and try to use them with VLC, Firefox, Brave, Deadbeef and many other softwares. For a while I can listen them but after few minutes there is no sound. The software playing the music shows that it is sending signal to the sound board. When I check audio window I see that the application is not recognized. How can I listen to .flac file music with any music player application?
Thanks and best wishes.

None of those are KDE apps, which signals that the problem is not in KDE software. It’s possible that some audio codecs are missing or the audio subsystem is misconfigured. Either way, this would be a problem at the distro/syste, you’ll have to ask the Ubuntu people about.

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