Sam,
Audio levels as measured on various types of VUs meters are grossly inaccurate, so you have to figure out what works on the machines you have and go by that. For instance, on a Digibeta’s meters, -20 equals 0 VU on an analog meter. If your peaks are close to that, then that volume will look right to you on the DBeta deck, but be really low when measured on a Beta-SP’s meters, for example. This is due to the difference in how each system reacts to and represents the peaks in the signal based on the ballistics of the metering system.
Avid’s meters are pretty responsive to peaks, so if you reference to -20, then your signal should have peaks in the +12 range in the Avid UI (as a guess). What you want to end up with when referenced to tone (-20 digital, 0 analog), is a signal with peaks at around -10 on a DBeta with the body of the signal close to or a little over -20. On an analog deck, the meters should be close to 0 with peaks hitting between 0 and +3. An analog reading with the bulk of the audio down around -7 or less is too quiet. Depending on the system you use, some compression may be in order, but don’t go heavy-handed, because it will get compressed again in the broadcast chain. These suggestions are for commercials or promos. You can back off a bit for programming, which doesn’t have to be in-your-face.
If you are going direct from the Mojo to the VTR, you should probably consider a basic mixer in between, since Mojo’s output is unbalanced.
Sincerely,
Oliver
Oliver Peters
Post-Production & Interactive Media
Orlando, FL
http://www.oliverpeters.com