I am editing with 5.1 audio and I try to find a way to fade-in or fade-out all audio channels simultanously without having to do all audio tracks separately.
It seems to me a very basic feature for software which is marketed to be able to work with 5.1 surround, but I can not find anyway to link tracks, or link envelopes. It seems parent - child track relations are only possible with video.

Am I overlooking something or is this really missing ?