The Launch Command
------------------

Audio playback (or a system command) can be initiated as soon as a mix is
complete.  The command is called "launch" and it is placed on the beginning of
a line in the prefs.txt file.  You place a tab between "launch" and the command.


Playback in Linux
-----------------
 
In Linux, my Waveplayer is designed for this, but you could use any command
line type of wave player.  The Waveplayer takes several command line
arguments all outlined in the Waveplayer manual, but for example if you entered

launch	  waveplayer plughw:0,0 preview.wav

waveplayer would be launched as soon as the mix was finished.  The soundcard
used would be plughw:0,0 and the file preview.wav would be ready to play.  If
you add more arguments such as

launch	 waveplayer plughw:0,0 10 25 mix1.wav px

Waveplayer will immediately play from 10 seconds to 25 seconds of mix1.wav and 
then exit.

Be sure Waveplayer or the application is installed in /usr/bin or other known 
path.  You can also have Waveplayer in the project directory and use the syntax

launch ./waveplayer


Playback in Mac
---------------

In the prefs.txt file use the launch command to start the aplplayer.  If the
aplplayer is in the project directory you would type

launch	./aplplayer mix1.wav

There is a tab betwen launch and ./aplplayer and a space before the mix 
filename.  Playback will begin as soon as the mix finishes and it will be sent 
to the soundcard set in the system menu.


Playback in Windows
-------------------

Use the launch command to start a wave file player.  A command line player is 
usually best for this application.