Describe the bug
The metadata section of audio files displays the length of a recording in seconds with 3 decimal points in accuracy. While this is correct information, it's not very readable and might create confusion.

To Reproduce
Steps to reproduce the behavior:

1. Upload an adio recording, for example an mp3 file
2. Wait until the file is processed
3. Look at metadata section

Expected behavior
It would be easier to understand if the length was displayed in hh:mm:ss or a similar format.

Aleph version
3.15.1rc1

Screenshots