Since I moved my desktop to Buster I noticed each time a sound is played there is a fade-in effect at the begining. The problem is short duration sounds, like notifications, does not sound at all, or you hear only the very end at low volume. A second play of the same sound just after the first sounds fine.
This happens with any program playing sounds: DragonPlayer, VLC, Audacity, System notifications... It seems there is a tmeout somewhere and everytime the sound stars a fade-in is produced. I revised pulseaudio configuration files, KDE preferences and googled a lot but I found nothing. Any idea how to disable this automatic fade-in? Thanks in advance.