mono/MonoGame — pull request #984 by Aranda (2012-11-14 00:27:20+00:00)
Title: Allow non-WINRT platforms to compile after changes in SoundEffect.cs

As the description states.

Note to self: In fixing this I noticed that `SoundEffect.CreateInstance()` is calling `new SoundEffectInstance()` every time. This should really be taken from a pool of SoundEffectInstance as it's going to be a significant source of garbage. That will be a change for another day.