Very nice, David! Very nice!
I do have one "nit" to pick, though. At times while you're explaining things to us in both videos, your voice tends to fade out and I can't hear what you're saying.
Also, I very much like the fact that as you select something, you tell us what it is and why. Overall, I give you a "9.9" which would have been a "10" if your voice hadn't faded.
Thanks for the Audacity information; I will also try it. And since I was popping in and out of Lync, I didn't get to hear you tell us abut Audacity.