I just bought Camtasia today, and got it downloaded a few minutes ago, I was just wondering two things. I seem to have it all down pretty well but these are confusing me. 1. If I choose my audio at beginning, and use speaker audio. Meaning it records the sounds I hear through my speakers. Later, when I speed up my video, will it speed up the music? 2. After I have recorded my video, can I input a song (.mp3) to go along with it? If not with Camtasia, is there another program I could use? Thank you.