A very newbie question. I have reviewed the tutorials and videos, but. When I click on the Scrub Mode button in the editable notation mode and I guide the cursor over the notes, I do not hear any notes. What have I done wrong? I am not using a synthesizer, etc., just my laptop speakers. Other sounds work fine during playback, etc. I can also not get the chords to play when I drag my cursor over them as I saw in the video? Thanks.