[Postman]

Don't sweat over levels that you hand to another mixer. He has faders that work as well as yours. Instead make sure you don't tie his hands too much. For instance don't compress or add radical eq or use noise reduction without having the originals available also. Give good clean sound. For instance, yesterday I received some narration pickups that were recorded by a big name local place with heavy compression and weird eq (no microphone could possibly sound like that without "help"). No doubt the facility it came from meant to be competitive, but that is NOT the way to hand over to someone else who then has to deal with it.

I would encourage you to mix your music to 2 or 3 "splits". It is incredibly helpful in the final surround mix to have lead elements of the music on different channels than the percussion, for instance, and maybe bass separated as well. Do not do any further "mastering" to the music. No overall eq or compression/limiting. That can easily be done during the final mix if necessary (rarely is it necessary).

48kHz/24 bit files are normal for video or film work. Do not give anyone 32 bit files!