Thanks for your help !!! and the quick answere !
i tried but it still does not work, its not shown anymore on the web-UI
hmmm, i could not find the volumio.log (/var/log/…)
just the mdp.log:
-bash-5.0$ cat mpd.log
Mar 09 14:11 : zeroconf: No global port, disabling zeroconf
Mar 09 14:11 : zeroconf: No global port, disabling zeroconf
Mar 09 14:12 : client: [0] opened from local
Mar 09 14:12 : exception: No such directory
Mar 09 14:12 : client: [1] opened from local
Mar 09 14:12 : zeroconf: No global port, disabling zeroconf
Mar 09 14:12 : client: [0] opened from 127.0.0.1:36078
Mar 09 14:12 : client: [1] opened from 127.0.0.1:36080
Mar 09 14:12 : client: [2] opened from 127.0.0.1:36092
Mar 09 14:12 : client: [3] opened from local
Mar 09 14:12 : client: [4] opened from 127.0.0.1:36104
Mar 09 14:13 : client: [5] opened from 127.0.0.1:36292
Mar 09 14:13 : client: [6] opened from 127.0.0.1:36296
Mar 09 14:13 : exception: Failed to read mixer for ‘alsa’: no such mixer control: PCM
Mar 09 14:13 : client: [0] closed
Mar 09 14:13 : client: [1] closed
Mar 09 14:13 : client: [2] closed
Mar 09 14:13 : client: [4] closed
Mar 09 14:14 : client: [5] closed
-bash-5.0$