Mute audio during a telephone call (AVM FRITZ!Box Routers)

[Retrofreak]

As the title says: It would be great to have such an addon. The frequently used routers and telephone systems from AVM can be monitored and while a call comes in, or goes out, the playing audio could be muted. There is a plugin for Volumio (https://github.com/volumio/volumio-plugins/blob/master/plugins/miscellanea/fritzcallmute/i18n/strings_de.json) - I would be more than happy, if something like this will be available for rAudio-1 ;-)