Slap quarter note with tremolo

Hello Moran. The standard way to play a draw or blow note is no articulation up to this point in your studies. If you need to play the same note multiple times, and it's a draw note, then you're correct, use a K. For a blow note, use the throat (the same action as thee tremolo... a slight cough).

Now that you're learning the slap, it will become your new default way of presenting a note.

After slapping your note, perform your tremolo. it takes practice to get the throat moving that soon. There's no trick except to focus on getting your throat tremolo going immediately after the slap.

I hope this helps clarify things.