DAC is my left channel, and DAC 2 is my right channel.
http://img526.imageshack.us/img526/8439/snapshot1t.png
How do I link them? So that when I change the volume from either the tray or keyboard, I change both DAC and DAC 2 at the same time, instead of just DAC? Please answer.
In YaST > Sound Configuration > Volume Settings, I noticed that it’s treating ADC and ADC 2 as the master volume channels. Could this have to do with anything? Please reply.
This is a rather specific function that you are trying to do that is likely not openSUSE specific. I recommend you install the program xchat, and ask the question on IRC channel “freenode” #alsa. You may have to ask a dozen times at different times of the day (as the guru’s who hang out there are from all over the world) before you get a response.