While I would love to tell you that it's a top-secret tone-thingy that Ron Wickersham has been developing, it is just a patch of velcro where I sometimes mount a Flip video camera.  The field of view is awful from that location, so ultimately I'll fab a mount for the headstock..
 
Here's what the video looks like from either end of the instrument:
 
body:

 
headstock:

 
John

Perfect accessory to reduce the  number of people wanting to play your alembic at Jam sessions.
 

 
jazzyvee

ROTFLMAO!!!!  
 
 
 
Bill, tgo

Thank You So Much, JazzyVee, my Christmas shopping list is now SOLVED ! ! !  
 
J o e y

No, not that cord with my Alembic!!!!
;-)

Why not, Mario?  You don't need to change batteries then!
 
Peter

But you will need to change your underwear.
 
hehehehe
 
Bill, tgo

Bill you are a scream man, what do you think this is gonna be plugged in to......!!!!

Oh, now I got it, Peter... I can even imagine if 9V makes all those wonders, what 127V would do!

Hurt..!!!  
Especially over here in the UK where we have 240v
 
:-)
 
Jazzyvee

Does this count?
 

 

Cool pic Flip!

Hey!  
I know that drummer!  
:-D

Keavin:

  Ollie:

  John - (is he looking for his bottle Bass?)

  Mystery man - sorry I do not remember who this is: