Multi-channel bar graph LED drivers
Sometimes it's cheaper to use a general purpose IC and program it to do what you want, then trying to find a bunch of special purpose ICs that aren't programmable, that do exactly what you want. 

This guy did a 64-band spectrum analyzer on a low end microcontroller, so doing 12 channels should be cake. (he also included a LCD driver...in your case you would have the software drive a matrix of LEDs instead). The circuit is fairly simple as well.

The microcontroller is cheap. To drive the LEDs, you will have 120 of them (10 x 12). You would just wire them in a matrix, and you could drive it with 4 shift registers which are also cheap. (Would take 6 I/O pins, plus or minus, depending on how you wired it).

http://elm-chan.org/works/akilcd/report_e.html