Quote - So right now there are more "no music" than "music."  Yes you are correct that audio does add more bandwidth ... wonder what the difference would be between that and a full narration? That's something I'd have to compare.

Here is a good example of the difference. Since one of my many hobbies was home recording, I have a some pretty decent software for mixing my songs. I just rendered a song to 128kbps mp3. The song is 21 tracks, rendered to 2 stereo tracks, with the song being about 5 minutes long. Total size was 4.15MB.

I then rendered a vocal track by itself from the same song to 128kbps mp3. The file size was 4.16MB rendered in mono.

It would seem to me that they are pretty much the same, and it would probably depend on what settings you use to record and render the soundtrack. With a vocal narration, I am pretty sure you can set the quality pretty low and still get workable results. With a music soundtrack, most people won't be able to tell the difference between 128kbps and 320. Only an audiophile would be able to tell the difference. You can experiment with this. I just did a quick test to see what would happen.

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.