From Modern Blues Harmonica, a video voyage to the core of blues tonality: the "blue third," a microtonally-inflected note that every player needs to know. Also here is a key expansion of the note into a double-stop. With Adam Gussow of Satan and Adam.
If you're interested in learning how to play REAL blues harmonica, please visit my website:
If you're a complete beginner, you'll want to visit the "Quick Start for beginners" page: