VLC changes pitch upon seeking
I thought I noticed tiny pitch changes at first, when playing regular music with VLC. So I did an experiment to confirm, and yes, indeed, VLC changes the pitch of music files shortly after seeking to some point. So far, it only seems to increase the pitch. (It was an MP3 by the way, but it seems to happen to .flac too)
The thread in which I asked about this phenomenon can be found here:
https://forum.videolan.org/viewtopic.php?f=2&t=114369
To test, I took a random music file, recorded before - and after seek, and then synchronized the starts. As one can clearly hear, the music quickly gets out of sync due to the pitch change: