Exclude specific selectable categories from random playlist

hello,

I checked the forum, but could not find (with my search phrases) a corresponding posting.
I love to play my music through the random playlist.
However, I have quite a few mp3s with the genre "spoken" or similar.
So during my music I hear also chapters of audio books or audio dramas.
I would love to exclude these genres from my random playlist.

I probably could into my file library only include those directories that do not contain these genres. But then I cannot listen to them on my tuner.

Did I miss a posting or description how to exclude genres from the random playlist?

thanks
Jürgen

Serviio 1.1
Windows Windows 7 Professional 64bit SP 1
NAD C446 playing in Upnp client mode

[zip]

It's not possible and I doubt it'll ever make it to the product, seems like very specialized usage of the random category.