There is possible to download automatic speech recognition engine Sphinx4 in two versions, one is bin, the other is src. It is explained how to build Sphinx4 engine with Ant here: http://cmusphinx.sourceforge.net/sphinx4/#how_build . However there are many applications which use this Sphinx4, e.g. HelloDigits. I'd like to create my own application. To do it, I enter home/mainaccount/tutorial/sphinx4-1.0beta3-src/sphinx4-1.0beta3/src/apps/edu/cmu/sphinx/demo/helloworld in Ubuntu 9.10 and see HelloWorld.java. To create my own application I can copy the whole directory with helloworld to .../demo/myapp, change all names from HelloWorld to myapp and then edit myapp.java file. OK, I've got code of my own application. But what if I'd like to build and use it? It is explained here http://cmusphinx.sourceforge.net/sphinx4/#setupide very shortly. Tell me, please, how to build this myapp with Ant.