Another board from my Spectrum Analyzer project, this was supposed to be the display driver.
I had originally intended to have a dedicated right and left channel, and a scanned 10 channel audio analysis function for the various frequencies being monitored.
The project used LM3914N bar/dot drivers recovered from another device, as well as recycled board and 10-turn trimpots from a hamvention purchase. I got as far as this before shelving it.
Eventually, I did build something with one of the LM3914Ns, a single audio level meter using fluorescent tubes. It was created for a friend who was "going to open a club." I'm sure it's still in it's box, somewhere...