Mis-ti-slav Ros-tro-po-vich
Here's a breakdown:
* Mis-ti-slav: The "s" sounds like the "s" in "sin". The stress is on the first syllable, "Mis".
* Ros-tro-po-vich: The "o" sounds like the "o" in "hot". The stress is on the second syllable, "tro".
It's helpful to remember that the "v" in "Rostropovich" is pronounced like a "w" sound.
Let me know if you have any other pronunciation questions!