Audio Issue in FCP 6.0x

[Howard Brodsky]

Follow up: I figured out what the problem was. For one thing I had my JVC DTV monitor turned off. The audio settings for output (in the audio video settings from the FCP menu) had been set to the AJA Kona card, so the audio would output from the monitor. Natuarally, I’m not going to hear anything if the monitor is turned off.

If I change the audio output to built-in line output, I see normal video on the FCP viewer window on my computer monitor and hear the fully synced audio from the speakers connected to my MacPro.

As mentioned, looking at the viewer, I see fully synced audio/video this way.

However – this is strange – the video from the viewer clips seems to be in slow motion on my JVC monitor and when I change the audio output to AJA Kona so I can listen to it on the JVC monitor, it is also out of sync.

So now I have a new problem to solve. How do I have normal video playback – from viewer clips – on the JVC monitor with synced audio output from the JVC monitor?

[Howard Brodsky]

I should add some information. The JVC DTV monitor is supplied with audio/video via an AJA Kona LHe and KL breakout box by a single HD-SDI cable.

If I have FCP audio settings set for built-in audio line output, I will see the video in sync on the FCP viewer on the MacPro’s monitor (the video of which is fed from an Nvidia GeForce 7300 GT card). I will still see video on the JVC Monitor, which is fed by the above-mentioned AJA Kona configuration, but for some reason I haven’t figured out, it plays in slow motion, whilst the MacPro’s monitor plays in normal motion. The sound is, of course, out of sync with the video on the JVC DTV monitor.

Even if I change the audio settings to the AJA Kona audio output so it plays through the JVC DTV monitor, the video still plays slow and the audio is out of sync.

I do not think that this has any relation to this issue but I recorded this particular video using a Canon XH-G1 set for rec run/drop frame at 1080i/60. I captured in FCP using a Canon HV20 as a deck, outputting via FireWire to a Convergent Design HD-Connect LE outputting from there via SDI to the Kona LHe and capturing in Final Cut Pro 6.0x in DVCPro HD 1080/29.97.

Played back from the FCP viewer, the video and audio files look normal and in sync on the MacPro’s monitor, but always slow on the JVC monitor and out of sync, whether I use built-in line output or Kona audio output settings in the FCP application.

I sure would like to know why this is happening.