These instructions are in some ways quite different than those for Linux or OSX. HTK must be built with 64-bit headers, and this requires the g++-multilib package plus a modification to the configuration file (though it's possible there is a way to do this from the command line). The installation for NumPy and SciPy is also fairly fraught on this Ubuntu release, and the release also does not include Ruby or pip. This method worked well for me.
These instructions are in some ways quite different than those for Linux or OSX. HTK must be built with 64-bit headers, and this requires the g++-multilib package plus a modification to the configuration file (though it's possible there is a way to do this from the command line). The installation for NumPy and SciPy is also fairly fraught on this Ubuntu release, and the release also does not include Ruby or pip. This method worked well for me.