看起来你很幸运... http://blogs.msdn.com/gillesk/archive/2009/03/23/playing-back-wave-files-in-silverlight.aspx http://code.msdn.microsoft.com/wavmss/Release/ProjectReleases.aspx?ReleaseId=2417 你应该能够在一定程度上修改它以合成。
彼特·布朗已经有一个工作原型: http://community.irritatedvowel.com/blogs/pete_browns_blog/archive/2009/03/23/Creating-Sound-using-MediaStreamSource-in-Silverlight-3-Beta.aspx
Charles Petzold有最好的例子:http://www.charlespetzold.com/blog/2009/07/Simple-Electronic-Music-Sequencer-for-Silverlight.html