This was fairly easy in Acrobat 8 Professional, since the imported audio was invisible by default (except for an easy-to-remove border.
But now with XI I can only seem to import audio that displays a gray set of playback controls (which I don't need, since I'll turn audio on and off with big invisible buttons and page turns) and a solid white background.
When I double click the imported audio with the "Select Object" tool I only see the options that were available when I imported the audio file (i.e. nothing about the playback controls, background, etc.
I've been searching the online help fruitlessly for like an hour, can anybody shine some light on this? It would be much appreciated!
Rich Media in Acrobat X and later uses a totally different embedding concept, and the annotation has to have a SWF "widget" to display - it's the widget that actually controls the media file playback.
If you want the annotation to be completely invisible you would need to embed a custom SWF widget that has nothing on the Flash stage - you can't just set it to be "invisible", and Acrobat doesn't like you making the annotation rectangle very small.
Since Dave has said it's impossible or almost impossible to exactly do what you need –
Were you intending to place this pdf on a Web page?
If so you might be better off to create webpages on your website say using Dreamweaver. Then you could do what you need easily. And not necessarily have to use Flash at all. (Even YouTube is getting away from Flash). Everyone is going to HTML 5 which avoids Flash like the plague, Because Adobe can't keep it secure. By the time they fix one problem as soon as an update is out a new isk opens.