chapter  9
Output and delivery
Pages 11

When delivering the mix on tape, a reference tone is needed to keep everyone on the same page. If the digital audio is going to be copied bit-by-bit to another drive, no reference is needed. But if the mix is going to be dubbed to tape, from tape, shot to optical sound or any process where the level can be altered, the head tone will give everyone a way to check that they are transferring, encoding, or broadcasting at the proper level. Even if you are certain the project will be delivered digitally, it never hurts to lay a head tone, just in case some day in the future there is a need to lay the dub to tape.