@BanginBaxter – Put a space between the words preceding your whisper and the dashes, and then between the last dash and the following words, and do not leave any spaces between the dashes and the words you want to whisper or emphasize.
Also to whisper you need to use two of the small dashes like this:—
You wrote: I got how to—whisper—down
With the spaces it becomes I got how to whisper down
Look in the space below the comment box to see a preview of how your post will look.