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Maximum selection length is about 2.14 billion samples (13.5 hours at a sample rate of 44100 Hz)Īlso beware that some noise sources are worse than others, and noise such as the 1000 Hz whine that often happens in USB audio interfaces may result in an ACX rejection even though it is below the -60 dBFS noise floor requirement.Įither places a single label at the first instance of a peak volume, or multiple labels at all the instances of that peak.Minimum selection length is 1/2 second.If one part of the selection is quieter than the rest, you will get a false value. The Noise Floor measurement is taken from the quietest half second of audio found in the selection.
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Even straight passes from this tool is NO guarantee of ACX acceptance. This tool is intended only as an aid in achieving ACX acceptance.In either case, the Label Sounds effect may be used to find where the problem occurs. Accidental inclusion of "absolute silence".Excessive use of Noise Reduction or Noise Gating.dB Warning (too low - Dead silence sounds unnatural.)" message are: The most common causes of the "Noise floor.