On Fri, 2005-07-01 at 12:45 +0200, Maarten de Boer wrote:
  why alsa does not
 do mixing in software by default  
Please reread the thread again.  It does do this by default.  ALSA 1.0.9
or later is required.
So all the advice needed is "make sure you use the latest ALSA".
Lee