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4.1 orignal mix? I highly doubt that.
It's either a 4.0 mix, mixed into a 2 channel layout onto an optical track or a 6 track for 70mm projection, which usually was 5 front channels and 1 back channel. Please correct me if I'm wrong. But a 4.1 discrete mix was never in theaters for this particular movie.
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OPUS is a lossy format. Transcoding a lossy format (DD) into another lossy format is not a good idea, even less if any further work is to be done on it. (Though I have done so before when a track needed to be resampled for syncing a 25fps DVD to the 23.976fps Blu and didn't want to waste a lossless bitrate on it)
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(2018-08-10, 11:13 PM)bendermac Wrote: (2018-08-10, 11:09 PM)TomArrow Wrote: OPUS is a lossy format.
OPUS is lossy? I never heard of this codec until the OP's thread. This makes this whole thing even more pointless.
At the OP: Don't get me wrong. Sharing source file, especially original mixes, is totally cool. But please share the original untouched files.
It seems to be the most efficient lossy format out there. Good codec by all means. But yeah, lossy. And also sadly has a hard cut off at 20 kHz, dunno why the developers did that.
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I know he did. It's wrong though and not really based on actual science afaik, more of a common myth. I did a test myself, I can hear frequencies over 20kHz. It's very faint, but audible. Not sure which one I tested, might have been either 22 or 24 kHz. You can try yourself.
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Beware, TomArrow, when you are talking frequencies that high you are as likely to hear distortion from your equipment as you are any actual sounds. That said, I wouldn't use Opus for a lossless purpose.
I also don't understand this project. I can see copying the 2.0 track, but the Pure Adrenaline BD has the original 4.0 mix: Dolby Digital Audio English 448 kbps 4.0 / 48 kHz / 448 kbps / DN -4dB
The reissued BD from Warner cuts this track and some other things to squeeze the film onto a BD25.
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(2018-08-11, 06:56 AM)Doctor M Wrote: Beware, TomArrow, when you are talking frequencies that high you are as likely to hear distortion from your equipment as you are any actual sounds. That said, I wouldn't use Opus for a lossless purpose.
I also don't understand this project. I can see copying the 2.0 track, but the Pure Adrenaline BD has the original 4.0 mix: Dolby Digital Audio English 448 kbps 4.0 / 48 kHz / 448 kbps / DN -4dB
The reissued BD from Warner cuts this track and some other things to squeeze the film onto a BD25.
My equipment used for that test was a Fireface 800 (supports up to 192 kHz sample rate, so effectively 96kHz) and AKG K701 reference headphones, whose audio frequency bandwidth is specified as 10 - 39800 Hz. Pretty sure I wasn't hearing distortions.
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I have the original DVD with both those tracks, however I've been unable to obtain the Adrenalin BR edition (though I think the European blu is the same master).
Yes when you share an AC3 track, share it as is in AC3.
