24 Muti-channel rendering

I need to render a 24 channels audio file(wav or aif) from the mix of several sources. Classic DAWs like Pro Tools or Cubase seem limited by the hardware.
Which software will allow me to do that in a convenient way?

Thanks for any help.

Sorry, but what exactly is the problem?

C5/C6 allows 256 physical inputs and outputs limited only by your hardware!!!