Airtight Cup - Part 3

You've tried it with a bullet... a cup... now let's just do it with your bare hands. Save idea applies... smother the harp as much as possible... as much flesh-to-flesh as possible... then drop your harp in your lap and then blow into your cup... what leaks out is where you need to work the closing of you cup up.

Want to hear an excellent example of hand cupping technique? Listen to Big Walter Horton's "Hobo Blues" on the Blind Pig album Fine Cuts.