I've finished my waveform animation circuit and have posted a bunch
of information about it on my website. I've been using this circuit
for over a month now and am very happy with it; I'll probably build 4
of them for myself. It took a long time to get the user guide written
up, along with all the pictures and sound samples. I always forget
how long it takes to do all that. PCBs are available for anyone who
wants to build their own. You can find schematics, user guide,
pictures, and sound samples at:
http://www.tellun.com/motm/diy/tln712/TLN-712.html