It turned out I wasn't listening for the right thing. Now, I'm stuck on Lesson 13, hearing intervals without a common note.

I would like to try out the software, but I'm already depressed. For some reason, on the very first lesson, I'm consistently 100% on the ascending intervals (2nd). But, the descending I'm just not hearing. Is that really reasonable? I mean it really sounds like my computer is playing the same note t...