Muting Radio while Satnav is giving guidance.

[ajw1100]

Not sure what I've done but before when using Built in SatNav or now with the AAWireless setup the radio sound muted when guidance was given, today the radio did not mute.
There must be an adjustment available somehwere in settings but I cannot find it!

 

[hermitdave]

With wireless CarPlay / Carlinkit, there is a separate volume for guidance which somehow isn't there when I used wired CarPlay.
I tend to wait for it to start a guidance and I turn it up.. once guidance finishes, I reduce the volume - which then reduce the audio system's volume.