Compressor settings for audio on iTunes movies?

Discussion in 'Digital Audio' started by Mackan, Jul 22, 2012.

  1. macrumors 65816

    Sep 16, 2007
    Does anyone possibly know what dynamic range compression settings are used on the audio for Apple's iTunes movies?

    I have studied the waveform for a couple of AAC and AC3 tracks from iTunes movies, and they seem to use a rather aggressive dynamic range compression, with the peaks more or less cut off at 0.4-0.5 on the linear scale for a waveform (I use Audacity to study it). It almost look like a hard limiter, but is not. And it's not distorted.

    I have been unable to reproduce their dynamic compression on my own downmixes of 6 channel material to 2 channel AAC.

    I don't how many are possible knowledgable in this area, but if anyone knows about what settings and tools are used for the dynamic compression of the audio on iTunes movies, I would be very happy to know.

    Or, if there is a general pattern for professional compression settings? Because I have also observed from some BBC blu ray movies that I ripped that their compressor settings looks very similar to Apple's.

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