Audio notification with amixer

[Pétùr]

Hi,

I use amixer to change audio volume. I have a notification when I use
the multimedia keys of my keyboard but not when I bind the amixer
command to another shortcut.

For example: "amixer -q set Master 5%+ unmute" is binded both to one of
the multimedia key and to Ctrl+PageUp. I have the two shortcuts in xfce
settings manager but I only have notifications for the multimedia key.

I believe xfce4-volumed is no longer active and that
xfce4-pulseaudio-plugin is the new replacement. I have
xfce4-pulseaudio-plugin installed.

How can I have audio notifications for keyboard shortcuts other than
multimedia keys?

Pétùr