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Horrendous audio over firewire out
Aloha from Maui,
I’m running FCP 5.14 on a 24″ Imac. Last week I purchased an external 750 gig Seagate Firewire drive from Costco. Amazing price!
Now that I have a decent external drive, I thought I might actually to move the TV show over to the Mac and FCP.
I get clean video via the Cannopus ADVC110 (firewire to analog video converter) but the audio stinks. It sounds to me like a sample rate issue. I switch the dip switch on the bottom of the Cannopus between 32k and 48k but don’t hear any difference. No change.
It was already switched to 48k when I started. This is, I believe, the FCP default sample rate.
I’m confused. Would somebody smarter than me care to pitch in? Should be plenty of you out there.
thanks
ron -
8 Replies
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My guess is an impedence mis-match between what is coming out of the ADVC 110 and your monitoring gear.
How are you monitoring the sound?
Does it sound overmodulated?
Best,
Tom
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I’m monitoring the output via the video monitor. It’s not overmodulated. Like I said in my post, it sounds like a sample rate mismatch.
Audio levels are fine.
Thanks,
ron -
Your audio levels can look fine in FCP, but you could still be coming into FCP too hot either due to the Canopus or your raw video is distorted. Just because levels ‘look’ fine, doesn’t mean the audio is good coming into FCP.
Even when I’ve had mismatch audio frequencies, the audio still sounds OK (usually there will be an occassional warble, pop, etc. that goes away when I convert to the correct frequency)
You can try digitize thru non-controlable device. See if FCP will bring the audo in at 48khz.
It sounds like a problem with Canopus…
Are you monitoring audio before you dig-via output of FCP? Does it sound clean? If so, then it’s a problem with FCP. If the audio sounds bad before or while digitizing, then it’s a Canopus issue.
Good Luck,
Todd at UCSB
Television Production -
The problem is not with audio coming in through the Cannopus. It’s audio from the timeline via firewire TO the Cannopus, and then to analog video and audio out.
ron
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It is unlikely to be a sample rate issue
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Thanks for the reply, as well as the attitude of your response. A bit more info…
Audio in the project is clean. I saved the 30 minute project as a series of three ten minute avi’s and combined them back into a thirty minute project on a PC. From there I output the clip to tape via VT4. Audio was clean throughout and will be on our local ABC affiliate on Sunday.
I also tried sending video/audio to camcorder via firewire. Video came through clean but audio not at all. That was on a Cannon GL2.
Although I did not address every statement/question you made, I think you will find that all were answered in the comments above, except for the command 0 command 9 thing. I’ll check that out.
Thanks
ron -
Good luck, Ron. Let us know how it turns out.
Tom
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Today I got hold of a new canopus advc110.
It worked.
For some reason the other advc110 would capture fine, but apparently will not output from firewire to analog. Last time I got video but no audio, this time nothing at all.
Thanks for swapping ideas.
ron
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