PGA2310/2311

I've read this topic: http://arduino.cc/forum/index.php/topic,22404.msg168955.html#msg168955

and the code worked just fine.

Now I want to use a second PGA chip (or the PGA4311) and use different volume settings. When I programmed those two settings I want to change both volumes simultaneously.

(I don't have to modify left and right)