This circuit connects to a PC's serial port and will read/write the AVox / MemKey.
Very cheap and easy to build (no SMD components / firmware).
I have the driver software somewhere.
http://hackaday.com/2014/02/19/ft232rl-real-or-fake/
It's fake. I've had some of these and they work slower / more inconsistently than the genuine part
It's the limits of FDM printers (the type most use at home - cheapest).
Better printers, like Objet, start at about $30K (and the UV liquid is $500 per Kg).
OK, I've built a few AtariVox USB interfaces.
If you're a developer, I will send you one for no charge.
(AAMOI I recently got burned with some fake FT232RL's. These chips work inconsistently and slower than the real version)