I think it is badly named in Dolphin and leads to confusion among users, it should not be called "audio preview" but "audio cover" or something similar. Audio preview I understand that is when you hover the mouse over the icon and it starts to sound automatically. The same could be said of videos, one thing is a "video thumbnail" and another thing is a "video preview", where if you hover your mouse over a file a small video should be played.

Dolphin lacks these two characteristics (audio and video preview) and I sincerely believe that they are essential today, the most **** website on the planet has more dynamism in this sense than a modern file manager like Dolphin.

You could file a bug report of the change the preview to thumbnail or something else: KDE bug tracker: https://bugs.kde.org



The thumbnailer review request #129985 - [kio-extras] Thumbs for audio files: https://git.reviewboard.kde.org/r/129985/


Earlier:
Automatic audio file preview with dolphin - viewtopic.php?f=223&t=118436
Dolphin automatic video preview - viewtopic.php?f=15&t=83134
--> A 'brainstorm' topic: Dolphin Video audio play hovering the file - viewtopic.php?f=83&t=92269

A bug (wish) report: Bug 378613 - Add auto preview support for audio files (dolphin/phonon - https://bugs.kde.org/show_bug.cgi?id=378613

A hack/workaround: Dolphin: play audio/videofiles on mouseover - viewtopic.php?f=225&t=136907

Wow! Many people asking for the same since 2009!