Multi MediaElement Sychronization in Silverlight

Question

Hi,

I'm trying to synchronise a set of MediaElement controls, each playing a specific instrument of a given music. Things go OK if I just play these MediaElements by starting them at the same time. They remain synchronized till the end.

But if try to pause/play them, they become unsynchronized (5 to 20 ms).

Any idea?

Thanks for your help.