do you know why my files have .mlv at the end instead of raw
The old way to get RAW, the first development was .RAW (you have that module too).
The last, with more advantages, is .MLV that include RAW and a lot of information to get more benefits. And right now is in development too.
.RAW doesn't have Audio.
.MLV yes, putting an audio Module.
Depends your OS, you should find a way to convert MLV to DNG.
Take a look in the beginning of the post.
Hope this help you.
Good Lantern!