Bill Koehler |
March 4th, 2009 05:26 PM |
Quote:
Originally Posted by Gary Randall
(Post 1022322)
Here is my problem; Every time I used the camera focus I got some interference in my headphones, which got recorded on the tape.
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This sounds like a classic case of driving the focus motor is causing electrical noise which shows up in the audio circuits.
Quote:
Originally Posted by Gary Randall
(Post 1022322)
When I changed my setting on the cam to Auto focus, I got the interference even more.
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If the focus motor is more active (Auto focus) you are getting more noise.
Quote:
Originally Posted by Gary Randall
(Post 1022322)
I went into the settings on the cam and changed from Auto Mic or Manual Mic. It cut down on the interference a little but it was still there.
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Putting it to manual mic. gain means quiet sections aren't getting boosted so much, so the electrical noise isn't so obvious.
Quote:
Originally Posted by Gary Randall
(Post 1022322)
I know it’s not the Mic, it worked prefect with my other cam (GL2)
Bottom line is every time the camera’s focus was used, I got the hum sound in my headphones and on my tape. Has anyone ever had this problem?
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Sounds like the GL2 has better electrical isolation of power from audio.
This is similar to something I've noticed in my old vintage 2000 Sony TRV-320 consumer cam.
If I shoot and capture directly to my laptop, I get better audio than if I stick a tape in the camcorder and record to tape.
My assumption is that driving the tape motor/transport mechanism is causing electrical noise that shows up in the audio, especially in quiet sections.
With that cam, switching to manual audio gain isn't even an option :-(
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