1. Open Common.mpq
2. Go to the "Sound" folder thing.
3. Next go to "Music".
4. Then to "CityMusic".
5. Now the city's music you want to change.
*If I were to do Stormwind, I'd do this*
6. Click Stormwind
7. Then copy the tree path of stormwind_intro-moment.mp3
8. Now get the sound file you want to change it to.
*I'll be using DDR Mario Mix - Pirate Dance*
9. Change DDR Mario Mix - Pirate Dance to stormwind_intro-moment.mp3
10. Then, go into MyWarCraftStudio and make a new MPQ file.
11. Click add file to archive.
12. Add stormwind_intro-moment.mp3 that was originally DDR Mario Mix - Pirate Dance
13. Save it then once you enter stormwind, DDR Mario Mix - Pirate Dance should play instead of what used to.
NOTE: This was only an example, you can edit ANY sound file this way.
~bonesZ