2) The inherent ambiguity of audio leaves much room for interpretation. Is this an impediment to the conveyance of ideas? [via Michael]

I feel like it is only an impediment to the extent that any limitations of a medium are an impediment to its ability to convey ideas. It is just as reliant on our experiences in terms of how that colors our interpretation; we all have varying associations with certain sounds as much as we have different associations with certain images. McKee even talks about sound poems, and I doubt that the interpretation of these is any more open than that of a traditional poem.