One of my apps is predominantly built around the audio component as it is for a recording studio to deliver mix and master files to artists.
It would be really cool to have an additional field in one of the inline lists that adds a simple circular audio component (or whichever cooler design, but in my head is how the previews work on the iTunes store). It would be cool to have it built into the action as has already been suggested, but wouldn’t want just a static icon for the action, I think to have the actual component embedded would be better.
It would be cool to have some more designs of the audio component generally speaking, my CSS is really limited.