Sorry about the lack of details previously, here is an attempt, step by step
I open a new vegas project.
I create a new audio track.
I put an mp3 or wav on the track. It is a song.
Insert an audio FX -- the Melodyne VST Plugin.
On the plugin I select "transfer audio" because the plugin needs to receive data
and save its own copy of the data to work with.
The plugin gives the message "waiting to receive audio"
I press play in Vegas
audio plays out the speakers.
The plugin still displays the message "waiting to receive audio"
No audio is transferred.
I cannot use the plugin.
Hope this helps a little bit more. Melodyne is a pitch shift and time stretch plugin. Since I wasn't so happy with the time stretch native to Vegas, I wanted to use a plugin...
Sorry to tell you that melodyne plugin will not work in vegas 'til sony updates to the latest VST-specs.
Melodyne-plugin records a temporary audiofile to analyse the material and than syncronizes to the playback. Therefor it needs transport- and timecodeinformation which, unfortunately, vegas does not submit to the plugin.