Mixer4, the new text input audio mixer has been updated.  The latest version contains a couple of eq bug fixes, and lots of work on a recursive reverb algorithm.  The user can choose the position of the listener in the room.   An RMS sensing compressor has been added to complement the peak sensing one.   Also, command line entry of source files is possible and makes submixing doable through a script.  Both 32 and 64 bit versions are available in the same small download.  A quick start pdf and manual are available, but please feel welcome to email me for additional help.
Grekim
www.acousticrefuge.com/mixer4.htm