Multiaudio, which is finally available in the Editor, is an upgraded audio addon that allows to combine multiple audio files.
Now it is possible to include multiple audio files in one Audio addon. In order to enable jumping between the files, it is enough to assign a unique ID to each of them in the Properties side menu. All files can be started with one Play button and then it is possible to freely switch them by selecting their corresponding icons.
A complete Multiaudio addon documentation is available here. To view a short Demo presentation, click here.