Good Quality Crossover Chip?

Hi,

I was looking through the TI website looking for specs of their PGA2310 (Audio Volume Control - Great! Chip). They have another under Audio Processors. It has an equaliser, volume, mute, mixing etc etc. It got me (re) thinking about a crossover chip. One that could, say, programme it to be a certain order and have an input and output - easy. Does anyone know of such a creation?

If not - why not?! Come on manufacturers...This'd be useful! ;)

Thanks
Gaz