Martin, you might check out this site
http://emergencydisastersurvivalfood.blogspot.com/
It is the site of Josiah Friberg "Disaster Nutrition Educator"
(quotation marks are mine)

Down on the left side there is clickable audio (two, actually, one short, one longer):

"Organic Survival Food Audio
Click Here for a 2-min audio on the best organic emergency survival food."

and

"20-min Audio of Best Organic Survival Food on the Planet
Click Here for the complete 20-min audio overview of the best organic disaster survival food on the planet."

I've just been called to work, so I haven't checked it out.

If anyone knows anything about this guy or his site (good or bad or other), please chime in.

Sue