Go to IBM's ViaVoice TTS website a http://www-4.ibm.com/software/speech/dev/ttssdk_linux.html.
Scroll down to the Downloads section, and click on the Downloads link. You will be asked to provide a username and password before you download anything.
Download the following files:
ViaVoice TTS SDK for Linux V5.1. The filename is viavoice_tts_sdk_5.tar.
ViaVoice TTS Run Time Kit for Linux V5.1. The filename is viavoice_tts_rtk_5.tar.
Now that you have installed the RTK, you can install the SDK as well using the following steps:
Type the cd command to change to the /usr/lib/ViaVoiceTTS/samples/cmdlinespeak/ directory.
Type the command ./runcmdlinespeak at the prompt. You should hear your computer say "Hello, welcome to ViaVoice Outloud for Linux." Normal system volume is often very low, so you may not be able to hear it very well. Refer to, Troubleshooting, for information on how to increase your system volume.
If for some reason your test was not successful, refer to the installation notes provided with both the RTK (ttsrt.readme.txt) and the SDK (ttssd.readme.txt) for debugging information.