How can I get Media Source Channel information from an audio clip in ExtendScript
Where can I find the information displayed in the following view from within ExtendScript:

I've looked at projectItem.getAudioChannelMapping but that just gives me the total number of channels (audioClipsNumber) and a channel type (audioChannelsType:0) which I read as "mono". This was originally a single media item with 6 internal channels and I unlinked them to get to the view above.
I've found other posts coming close to this topic but I don't need to "revert" anything to any kind of original setup. I just want to programatically see what the dialog window above is presenting.
