You've asked for it, we're delivering!
Full PlayMaker support is coming to Master Audio and Killer Waves soon!
Here's a preview of the Master Audio integration:
Stay tuned for news of the release, and, as always, keep an eye on our threads on the Unity forum:
http://forum.unity3d.com/threads/168074-Master-Audio-RELEASED-Complete-audio-setup-amp-control-tool
http://forum.unity3d.com/threads/167910-Brand-new-Killer-Waves-(wave-spawning-plugin)-demo-video-up!