This is a writeup of the steps I took to perform acoustic model adaptation for an acoustic model to be used in Sphinx 4. I followed the well-written CMU howto. I performed all steps on a mostly-new Ubuntu 11.04 install and adapted the Communicator acoustic model for use in Sphinx 4. Keep an eye out for paths that may be different on your system and any error messages that pop up when running these commands.
I also generated a new, full set of adaptation prompt data from the CMU ARCTIC prompts.