To build the voice prompts you need to download the build tools
downloads/Voice_Prompts/tools
To save people having to completely re-generate all the MP3 files from scratch, as there are approximately 80,000 files, the MP3's and data files can be downloaded from
downloads/Voice_Prompts/data
You need to unzip these files into the same director you put the tools
Note. This file is large > 70Mb zip
You also need Python installed on your computer
On windows you can use the build_all.bat file to do a complete build.
Note. You must have an opengd77 radio connected to your PC and turned on, becuase the scripts need to use the radio to compress the data into AMBE format. AMBE has IP issues and hence AFIK there is no AMBE compressor program that runs natively on either Windows or Linux or Mac etc