Steve House |
October 10th, 2008 04:18 PM |
I haven't been able to locate an online copy of the manual to look up just what trim settings and adjustments you're talking about. Are you talking about an input sensitivity or attenuator setting of some sort or are you asking about the audio recording input gain (or recording level) setting? Meanwhile here are some general guidelines that might help.
You should use the setting that gives normal recording levels as indicated on the camera's meters. Output levels are irrelevant while recording as they are as much a function of the playback or headphone volume settings as they are of the recording settings, you've got to use the meters. Your actual output levels for the final program are set in post production, not in the camera original - your aim in the original recording is to provide the best raw material possible to work with later. For the best signal/noise ratio you want to record at the hottest levels you can without going so hot that you approach clipping on peaks. The exact settings that will accomplish that depend on many factors, including the volume of the original sounds you're capturing, so there's no 'magic number' on the dials that you should use. You need to monitor the meters for levels as you shoot. Assuming the camera has peak reading meters as is the norm in digital equipment, you want to make sure the average levels are as high as possible without peaks ever going over about -3dBFS. (0dBFS is the true digital 'never exceed' level but it's possible for peaks causing audible clipping distortion to be so brief that they don't register on the meter, hence -3 to provide a safety margin.) If there are both input level and input trim controls. you should use the trim setting that gives you this when the level dial is about 2/3 of the way up. You also need to listen while recording through good quality, isolating, headphones set to a comfortable volume level in order to judge subjective quality, catch interfering noises, etc.
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