(And Adobe… are you listening?)
I’m ramping up, learning Silverlight / Blend / XAML, and I’ve been using some great online tutorials and book. I just found out on my own with zero help from anybody how stinking easy it is to incorporate audio to your projects, especially in Blend. Do you know how much ActionScript code you’d have to write, how much wrangling you’d need to do to do this very thing in Flash? Uh… much more.

Step 1, Drag PlaySoundAction to your object
Step 1:
On the Assets tab, select Behaviors. On the next panel that opens up, look for (you probably don’t even need any help from now on…) look for PlaySoundAction.
You’re halfway done. Seriously.
Step 2:
Drag that PlaySoundAction to whatever icon/image/button/thingamajig on your object list. On the Properties tab, select what type of Trigger Event you’d like this audio clip to play after (I selected MouseEnter in this example) and under CommonProperties, select the source (I manually imported my mp3 clip to the Projects Library list, and just had to use the down arrow to select it from the list. If not, you can get the audio clip you want by clicking the elipses (…) to get it from your computer/network.

Step 2, Choose audio file and Event Trigger
And that’s it.
Now, the audio clip must be in an ‘appropriate’ Silverlight format, mp3, mp4, wma, wmv, asf, or asx. You might need to convert an old wav file. Seriously, this was the hardest part of the process.
I’m going to be the smartest mofo at the Silverlight Firestarter 2010 event… well, no, no way. Maybe in my family. My mother doesn’t know jack about Silverlight. So I got that going for me.