You don't have to do anything different! Just do whatever it is you were doing before!

[the bard clears their throat.]

Ready?

[probably not but this is happening anyway. the bard launches into a murmuring sort of dirge.]

♪ Aaaaaaaaaahhhh ~~~ ♪

♪ Ohh fallen Count
How could this carnage be?
Our only aim
To make some new friends for free

We hardly even knew you before you had to die
So give us one last word with you before we say goodbye
My new friend here has tried his best; I too am giving all
Don't tell us that we're amateurs, we've got the wherewithal

Come back to us
Your death must be resolved
Come back to us
Our guilt must be absolved
Come back to us...
Come back to us... ♪

[This is every bit as cringey as Klaus has imagined in his head, so it is probably not a surprise when no ghosts make an appearance.

Though it isn't for lack of trying. Every word seems to reverberate in the air, dim lights of every color fade in and out, and by the time they are done, the flowers in the room have all turned a dark navy blue.]

......................

Maybe there just aren't ghosts here.

[The bard looks annoyed.]