How do I select from a number of audio sources? I would normally use the "Select Input" node, which is what I do for movie frames. But it won't accept the decoded audio from the "Play Movie" node, nor will it accept the output from the "MIx Audio Channels". In essence I have N movie sources each with their own sound track, I need to switch between them with the audio being use in the "Send Live Audio" node. HELP.