No more sound after upgrade

I decided to upgrade to the latest version but i have no sound any more…
Everyhting used to work prefectly few minutes ago :frowning:
What happened ?

I had a stereo2monio plugin because I have only one speaker. Would it be the problem ?
Really dispointed and just want to throw it away !

Volumio Information

Volumio Version: 2.834
Hardware: rpi zer.o w
DAC: JustBoom DAC Zero pHAT

Disable the plugin. Set your Dac and volume mixer in playback settings. Reboot. Check if sound is ok. If yes, enable the plugin.
Let me know,:wink:

Thanks it works but I have uninstalled by error the plugins
is therere another way do downmix stereo to mono without using a plugin ?