But this give me new trouble.
If I just use the Mouse-Wheel to change volume via the Meta-Bar Icon, it adjust the “Internal Audio” Line, but not the Easy-Effects Sink.
Same for my Keyboard shortcut.
Question: How can I archive to have the Easy Effect Line as default to adjust the system volume?
If I set the radio-buttons to “Internal Audio Analog Stereo” for output and input, it works again.
I thought I must change the default to Easy effects to let them take effect, but easy-effects also work, if you keep the radio buttons activated on “Internal Audio Analog Stereo”.