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#1 |
New Boot
Join Date: Mar 2005
Location: Hattiesburg, MS
Posts: 19
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Audio Pops During Capture
Clicks and pops are introduced into my audio during capture from my Canon XL2 using Final Cut Pro. It doesn't happen all the time, and if I decide to capture the clip(s) again, the clicks and pops don't occur in the same places, or even not at all. When I listen to the source audio, the pops are not present. I have no idea what might be causing this problem. Can a firewire cable go bad?
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#2 |
Major Player
Join Date: Jun 2007
Location: The Colony TX
Posts: 327
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Yes, it's possible. Especially with the tiny 4-conductor plug on the back of the camera. Why they chose that particular plug is beyond me. I'd rather have the honking big 6-conductor "standard" firewire plug. I'm always worried I'll break it when I connect to capture.
Never had any audio problems capturing from my XL-2, though I'm running Premier CS3. Buying or borrowing another firewire cable would be the easiest way to check. Hopefully it's the cable, and not the camera. Though, generally, I'd expect a cable defect would show up as causing problems with BOTH audio and video, and should give you a system error of some kind if it's really major. Regards; Martin
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Canon XF300, Canon 5DMkII, Canon XL2, Rolls MX422 mixer, Zoom H4N, AT899 lavs, AT2020's, Azden SGM 1X shotgun, Manfrotto 501 head on 351 tripod |
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#3 |
Major Player
Join Date: May 2006
Location: Nashville, TN
Posts: 253
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Make sure and double check the sample rates. The only time I remember that happening to me is when my audio sample rate doesn't match the timeline sample rate. You might have already checked but it doesn't hurt to check again.
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#4 | |
Inner Circle
Join Date: Aug 2005
Location: Atlanta/USA
Posts: 2,515
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Quote:
When you say "source audio" what do you exactly mean? Playing the tape on camera? Watching the video on some other software, not the NLE? Have you tested the setup with another, known good tape? Also test without tape, just run the camera in standby and capture. One idea that comes to mind is an electrostatically charged tape that may discharge to the video head when the tape runs... just a technician's idea, not real word experience. This scenario would explain the randomness of the pops. |
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#5 |
Fred Retread
Join Date: Jul 2004
Location: Hartford, CT
Posts: 1,227
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Record the audio from the cam's headphone jack into your computer's sound board. If it's clean, as it was when I did it, that rules out the tape and everything in the tape playback system. Plus, then you have a usable track.
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"Nothing in the world can take the place of persistence..." - Calvin Coolidge "My brain is wired to want to know how other things are wired." - Me |
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#6 | |
Regular Crew
Join Date: Nov 2006
Location: Paris, France
Posts: 42
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which computer system?
Quote:
There's a free tool called DPC Latency Checker showing how much audio/video realtime your Windows' kernel can be, and disabling some of the devices on laptop or pc shows live improvement on that tool. Not sure this addresses your troubles but often the pc/mac hardware issues may be important about clicks and pops, check forums dedicated to your computer system. Alex |
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