If you have some music data in memory, or as application resource, you can play this data by opening memory stream. 

There is also possibility to use internal buffer so user can destroy original music data, or garbage collector can move this data. 

Another feature is dynamic stream. You can add new data to dynamic stream, useful for internet streams. 

To open memory stream use:  

At the end you need to close previous stream to free allocated resources. 

Open file, memory stream or wave-in