I don't think it's your sound at all. I think it's that background on your menu screen. I get some craaazy bad slowdown when it's open, and with every arrow-key event (switching to menu options and such) it lags really bad.
The volume slider is the worst. It's not playing every 75ms... more like every half a second. And the entire screen jerks and lags along with it.
It looks like you have some pretty heavy shader use going on, and maybe canvases or something. I do recall you mentioning something about erasing the corners of your menu in a previous post... and the sprites look like they at least have Glow on them.
Anyway, no it doesn't crash for me, but I really would not be surprised that it crashes for you or other people with lower-end computers than mine. You're choking it to death. You need some serious optimization.
And if you're wondering "well why did it only start crashing when I added the sound?" the I guess that's just a final-straw scenario.