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Mackan
Jul 22, 2012, 09:11 AM
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.