We need to create a custom announcement file in the following format. We have been told that Audacity is the best tool to do this. Can you please provide a step by step procedure to accomplish the same?
To create an audio file with Audacity, you need to “Export” (File menu).
The default export format is 16 bit WAV.
Assuming that you have already recorded or imported the audio that you want, into Audacity, you just need to set the “Project Rate” (bottom left corner of the main Audacity window) to 8000, the Export as a WAV file (File menu > Export).