This is a default audio source for AJT Japanese. It maps words to their pronunciations. To use the audio source, install AJT Japanese and add at least one audio profile. When a note is added or modified, the audio files will be added automatically.
To use this audio source offline without having to connect to the Internet,
download this repository
or clone it with git clone to any location on your hard drive,
copy the full path to the index.json file and paste it into the "URL" field in the add-on's Options.
The add-on will figure out the rest based on the information inside the json file.