No sound from piano roll with Variaudio when pitch correcting?

Thanks for replying, but are you sure we are talking about the same thing? I am not in a MIDI track in which I am allowed to click any key in the piano roll and hear the sound.

I am trying to edit a vocal recording track and use variaudio to correct the pitch, however, I do active the acoustic feedback, and still no sound from the piano roll. I don’t know how to configure control room, and could you please give me a more specific explanation or simply post a link of the previous discussing from the forum? I did some search, and couldn’t find anything.

Thank you very much!