I see. I tried a little with status bar syntax and here are some possibilities. It was easier than I thought.
Pre-Emphasis: $if($meta(pre-emphasis),Yes,No)
or Pre-Emphasis: $if($meta(pre_emphasis),Yes,No)
Depends on your tag name. It doesn't matter which value you are using 1, on or yes. It simply scans for PRE-EMPHASIS or PRE_EMPHASIS tag name presence.
second Pre-Emphasis: $ifequal($meta(pre-emphasis),1,Yes,No)
or again Pre-Emphasis: $ifequal($meta(pre_emphasis),1,Yes,No)
This one only works with value 1 and NOT with on or yes. I guess there are other possibilities. Hope this helps.