Settings for 5.1 and Lt/Rt, to HDCAM SR and Blu-ray?

[Glenn Camhi]

Grazie Mark! That exhausts my questions.

Sounds like they might want the Lt/Rt tracks separately as well, and just want to use the QT audio for verifying sync. Not sure, but I’ll bring them too just in case.

[Glenn Camhi]

Well, interesting. When an AC3 is made right off the QuickTime file, the LtRt mix sounds great whether played as straight stereo or decoded ProLogic II.

However, when an AC3 is made from an AIF file exported from Final Cut, it sounds lousy when played as straight stereo. Something happens in the export process from Final Cut that messes up the file.

Could it be some setting? I’ve set the tracks as a stereo pair in Sequence Settings / Audio Outputs, and tried both Stereo Downmix and Channel Grouped, and in the export AIFF options I’ve set it for Stereo Mix.

[Mark Spano]

As long as the sequence setting is set for 2 Outputs, Stereo Monitoring, and the channels set to Channel Grouped (with A1 panned hard left and A2 panned hard right), then the sequence playback should be exactly what is in the Quicktime. I can’t think of anything you’d have wrong there.

[Glenn Camhi]

Thanks Mark. Weird, eh? Could Stereo Downmix have caused an issue? Maybe that’s the version we’ve been testing most recently? I’ve tried both. (Though I thought Channel Grouped does a stereo downmix anyway with stereo pairs.)

[Mark Spano]

I don’t think it makes a difference there, since you’ve got just two tracks those two settings should come out identical…

[Glenn Camhi]

Yeah, it is odd. Thanks for confirming.

Can’t imagine what could be happening in the export of the AIFF file, but something is.