Audio Distorted – Kona 3

[Jeremy Garchow]

What versions of everything are you running? (FCP, QT, OS)

Are you running the audio out embedded or analog?

DO the levels in your FCP timeline clip?

Much more info is needed to help diagnose your problem.

Jeremy

[Frederic Lumiere]

Jeremy, thanks for taking the time to respond.

Answers to your questions:

– FCP 5.1.4
– AJA Control Panel 3.4
– QT 7.1.6

Audio embedded in SDI (4 channels)

Levels in FCP don’t clip and transfer doesn’t distort 2 out of 3 times… when it distorts, I simply restart it and it works.

I heard a rumor that it might be a memory allocation issue?

Thanks,

Frederic

[Jeremy Garchow]

[lumiere] “I heard a rumor that it might be a memory allocation issue?”

Don’t know about that.

Did you try mixing down your audio first?

What OS are you running and on what computer?

[Frederic Lumiere]

I don’t want to mix down the audio – need 4 independent channels to the deck Full Mix (1&2) & M&E tracks (3&4).

Computer is 2 X 3 GHZ DUAL CORE – 4 GB RAM

Frederic

[Jeremy Garchow]

Okay, one last time what version of the OS (operating system, OSX, 10.4.?)

Mixing down the audio in FCP does not mixdown the audio in the Avid or audio sense of the word. FCP basically condenses all the audio (in the proper channels that you have assigned) for easier playback. Select your whole timeline and hit command-option-r. It won’t ruin anything, I promise. Your channel configurations will remain in tact.

Jeremy

[Steve Covello]

I believe this a reference sync issue. I have had this problem with HDCam numerous times about a year ago. this was with K2, so it might not be the same problem.

Damn, I can’t remember the magic combination but I think it involves the Control Panel set to Free Run, and then the HDCam deck has to be set to Video In for reference via the Setup menu [F2? F6? Should say so on the display panel]. I’m pretty sure it is that, or try some other combination of HDCam settings while running AJA in free Run.

It annoyed the hell outta me that my Ref in blackburst seemed to be insufficient to make the AJA and HDCam play nice together. Wasted much time getting it right, then remained paranoid ever since.

Sorry I’m being a weenie about the answer, but at least I’ve had the problem and found a way out of it, so hang in there.

steve covello

[Frederic Lumiere]

Jeremy,

I don’t think you mean using the downmix option in the fcp audio mixer tool… my understanding is that will flatten my 4 channels into 2 and completely ruin my master.

Also, my understanding of command-option-r is just to render a downmix isn’t it? It doesn’t downmix it.

Thanks,

Frederic

BTW, how do I quote a post when responding?

[Frederic Lumiere]

Steve,

Yes – this sounds like a very plausible solution. I switched to free run on aja and ref – input on the deck.

Haven’t had the issue since then but then again, I’ve only done one master since… will update this post with an update either way.

I think this is very promising and will save me a lot of headache.

THANKS!

Frederic

[Jeremy Garchow]

[lumiere] “I don’t think you mean using the downmix option in the fcp audio mixer tool”

No, I don’t mean that.

[lumiere] “Also, my understanding of command-option-r is just to render a downmix isn’t it? It doesn’t downmix it.”

Correct. Not in the technical sense of the word.

[lumiere] “BTW, how do I quote a post when responding?
“

Select the words in the post that you want to quote and hit shift-q.

Jeremy

[Frederic Lumiere]

[JeremyG] “[lumiere] “Also, my understanding of command-option-r is just to render a downmix isn’t it? It doesn’t downmix it.”

Correct. Not in the technical sense of the word.”

So what does it do exactly that audio render doesn’t do?

BTW, looks like Steve’s solution: ref in freerun on kona and input on the deck might’ve worked. Haven’t been experiencing the issue since then.

Frederic