Which file type should I use?

[mcholley]

Hey there,

I use Pro Tools, and am just learning about using drum loops. Should I be using wav or rex files? I think they both work, I am wondering about shifting of tempo, and which file type would be best?

Also, do you have a favorite source for drum loops? I've listened to some by Smart Loops, as well as Drums on Demand...

Thanks for any help!

Mark