I noticed that volume plugin lxpanel in slitaz only calls gnome-alsamixer and alsamixer when right-click the volume applet and select VOLUME CONTROL SETTINGS. Can you please add more mixers that can be call from volume applet lxpanel like this one that I found
https://github.com/raspberrypi-ui/lxpanel/blob/master/plugins/volumealsa/volumealsa.c
I suggest these mixers must be supported on lxpanel volume plugin:
kmix
pavucontrol
gnome-sound-applet
mate-sound-applet
xfce4-mixer
sgmixer
zmixer
pimixer
alsamixergui
qasmixer
