I’ve had problems playing off the timeline into a Panasonic DVD recorder. Mine was because the recorder was never set up to any kind of reference level, nor was the FCP system.
I found that by normalizing my timeline audio for a -6 DB peak, my output to DVDStudio as well as play-outs to the stand-alone recorder resulted in a better overall audio level, without further needs for adjustments. Why -6? Dunno, came to it by trial and error and by ear, not very scientific. Scientific would be everything peaking at 0, I guess… I know from testing that stuff mastered at -6 peaks on my system will play and sound “normal” in comparison to movies on DVD rented from blockbuster as well as the level of the shows on my local cable channels.
I think your existing recorders use AGC for riding the levels? If so, you want to feed them a level that doesn’t force the auto-leveler to clip the peaks or pump the noise becasue the incoming signal level is low.
Yes, a more expensive deck with independent audio controls onthe inputs can solve this, but it’s treating the symptoms, not the disease, if you take my meaning. Follow your signal chain back to the computer and any mixer/amp/speakers you have outboard of that.
Go back to basics and use your tone genrators and displays, and a sample of human speech, to get everything lined up to the same reference level, then you won’t have to constantly be figuring out “fudge factors” between different hookups. Then, when the knobs for the speakers and headphones have been set, glue them down, tape them over, rip them off, anything to disable them from being messed with again. Or I suppose some sharpie marks would do as well:-)
The point is, in a shop where people share systems, you’d better have some kind of standard reference points established for everything, or you’ll never have the same mix setup twice.
Everything will just come out sounding “right” the first time.