With Dreamweaver CS5. This step is logical and necessary. Step into any elevator, and half the people in it are staring at their phones. Your boss is probably one of them, and he or she knows that all the cool companies are developing mobile versions of their websites--and iPhone applications and Android applications--and it's all up to you to develop them while you also keep the doors from falling off the old website. And while you're at it, you should update all your old code to HTML 5, because that's what everyone else is doing, right?
Finally, we get to Soundtrack Pro. Fortunately, Final Cut Pro X upgrades much of the audio-editing tools. For instance, sound can now be edited to precision levels. One reason you needed apps like Soundtrack was because Final Cut Pro audio tools still lived in a world where frames are king.
Editors around the world know the pain and frustration of trying to remove that half-frame long pop or click.