If my audio is just tickling the red bars on the audio levels meter on the dvx 100, does it need to be brought down a tad ? It doesn't sound like I'm blowing out the sound on my headphones, but just don't know how much I can get away with.
Panasonic picked a funny way to display the levels. The red bars start lighting up at -12dB, well within the safe zone for recording. Each bar represents 2 dB, so the last red bar represents 0 dB. The thin red bar means you're over 0 dB--or overloading the signal. I like to see my peaks topping out at about -6 dB which is lighting up the first 3 red bars. This leaves 6 dB of headroom for really loud transient peaks. If you're not hitting the red bars, you're recording at below -12dB, which is a bit low.
Yes, if anyone at Panasonic is listening - PLEASE consider standard Green->yellow->red bars for future updates!
For music recording, when I can do a good sound check, I run up to the penultimate bar with no problems. But if you're not very sure about what you'll be recording, keep it a notch below that to allow for surprises...
I also remember reading in another thread that you can set one channels audio level and little lower/higher than the other one just to be safe and have a backup if youre not happy with one of them.