I have a very simple project that consists of just some captured video from
my DV camcorder (captured via WMM into a WMV at 2.1 Mbps) but trying to
control the audio level is just driving me nuts.

If I use headphones to listen to the audio everything works great (sound
quality is high and volume is high). But if I pull out the headphones and
listen to the audio on the PC speakers the audio is barely audible (sound
quality is poor and volume very low). I thought perhaps the problem was the
PC speakers but they handle other sound just fine, in fact when I add an MP3
to the Audio/Music track on the timeline the MP3 plays just fine on the PC
speakers. I've been playing with the audio level slider control any which way
I can think of but I can't get it to fix the problem. However, the most
frustrating part is that every now and then (say 1 in 20 attempts), pulling
the audio levels slider all the way to the "Audio from video" side actually
fixes the problem and the sound I want comes out of my PC speakers. But I
can't figure out what it is that makes it work on those rare occasions and I
can't seem to save that result for future use. Since I have heard the sound I
want from the PC speakers, it makes me think the speakers work and that there
is just something about controlling the audio level of the WMV file that I
don't understand.

I would appreciate any advice on this. Thanks so much.

Rob