DR-HD100 buzz in audio at DVinfo.net

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Old July 19th, 2007, 10:25 AM   #1
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DR-HD100 buzz in audio

I've just completed my first shoot with the firestore JVC DR-100, and have noticed a constant high pitched buzz throughout all the audio. The audio on the tape is clean. The shoot was in an office using Sony lav microphones, no buzz was heard during the shoot through headphones.

Anyone else run into this problem?

Is there a setting either on the camera or DR-100 I should be aware of to avoid this from happening again.

DR-100 was running off it's own battery
CAMERA JVC HD110 with DR-100 mounted on special IDX bracket
Thanks for your help with this.
Gary
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Old July 19th, 2007, 11:44 AM   #2
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Hello
Gary did you try using your stock mic
maybe you need a clamp filter on you fire wire
i have the same outfit you have and had no problems

Joe
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Old July 19th, 2007, 11:50 AM   #3
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Thanks for the reply.
Can you explain what you mean by a "clamp" for the firewire?

Gary
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Old July 19th, 2007, 02:30 PM   #4
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Hi
Gary did you buy your 110 new
if so in the manual that came with it on page 2 there a picture of the clamp
if you don't have the manual let me i'll send you picture
the clamp filter is for audio/IEEE/1394 CABLE
YOU should have got 1 when you got your camera
i don't know if this will solve your problem but it's worth a try


Joe
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Old July 19th, 2007, 05:23 PM   #5
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I did find the clamp filter. I will give that a try, plus I'll try another firewire cable too. I'll keep you posted after the test.
Once again thanks for your input.
Gary
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Old July 19th, 2007, 08:54 PM   #6
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Added the clamp to the firewire...still bad buzz in audio
Tried new firewire cable...still bad buzz in audio
Any other suggestions?

Should I contact Focus?
Audio from tape is clean!
Thanks,
Gary
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Old July 19th, 2007, 10:29 PM   #7
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Hi
Gary
Thats what i would do
Sorry i wish i could have you
Let me know how you make out with Dr 100

Joe
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Old July 19th, 2007, 11:40 PM   #8
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Hi
Gary what program do you edit with
does this happen were ever you shoot
have you try playing those clips back thourgh the 110
or does is it just when you down load to your computer
i just remember i had a buzz noise once
when i play my clips on my computer
after i edit them and dump the to dvd the noise was gone
i use vegas 6.0

just i would mention this

good luck
Joe
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Old July 20th, 2007, 08:37 AM   #9
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Joe,
Thanks for helping out. OK, now things get even more confusing. When I play the clips through the DR-HD100 through the camera, the audio is fine. It's only when the clips are imported into the computer that the buzz appears.
If I export a Aif file, it has the buzz. Play it in Itunes...BUZZ. I will encode a DVD to see if it's on the final output, but that doesn't seem right. How would you be able to EQ audio if the sound on the computer adds additional noise??
What if your final delivery is for the WEB. The buzz is also in compressed QT files. Is this a FCP problem?
Thanks,
Gary
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Old July 20th, 2007, 11:08 AM   #10
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Quote:
Originally Posted by Gary Krimstein View Post
Joe,
Thanks for helping out. OK, now things get even more confusing. When I play the clips through the DR-HD100 through the camera, the audio is fine. It's only when the clips are imported into the computer that the buzz appears.
If I export a Aif file, it has the buzz. Play it in Itunes...BUZZ. I will encode a DVD to see if it's on the final output, but that doesn't seem right. How would you be able to EQ audio if the sound on the computer adds additional noise??
What if your final delivery is for the WEB. The buzz is also in compressed QT files. Is this a FCP problem?
Thanks,
Gary
Is there any way to post the aif or a wav of the sound? so that we can hear it as well?

S
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Old July 20th, 2007, 01:23 PM   #11
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Hello
Gary its sounds like the problem be may you computer
is there any other computer you could down load you files to

i know on my pc i can just down load the my files (m2T) to my computer
and play them in WINDOWS MEDIA PLAYER.
I review them what i lke i edit.

Just a thought
maybe its a firewire port issuse on your computer

it just seem weird that DR 100 plays great thourgh your 110

let me Know how you make out

Joe
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Old July 20th, 2007, 03:18 PM   #12
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I don't have another computer at the moment I can check it with, but I'll look into that Monday. I've tried 2 different ports on the computer and I had the same problem.

I've tried to upload two small wav files to let you hear the buzz, but I get a failure note when I try to attach the two small wav files.

Will FOCUS return a call or email!!

Thanks,
Gary
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Old July 20th, 2007, 04:24 PM   #13
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http://www.tindeck.com/ try them if you want to host the wav fie somewhere, it should be easier on us all than rapidshare or the like.
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Old July 27th, 2007, 09:58 AM   #14
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LATEST UPDATE
I've been busy on other projects this week, but I did do several tests, and FOCUS did get back in touch with me, and we did some trouble shooting.
I checked it on several different MACS, tried different firewire cables and ports into the computer. Just playing the "RAW" quicktime clip in quicktime player. Still had the buzz on all the Firestore clips. Once again, the files play fine through the camera, but once they are imported to the computer, the buzz appears on the clips. Another issue, the clips would sometimes freeze and "jutter" playing back through the Firestore into the camera. The clips on the computer played fine, however had the audio problem. FOCUS said it should not freeze or "jutter". Long story short, I'm sending back the unit, FOCUS thinks it's a bad drive. I'll keep you posted on the progress of this issue.

Sorry for rambling, but just wanted to update all the helpful folks on DVinfo.
Thanks for all your help.
Gary
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Old July 31st, 2007, 07:12 AM   #15
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Gary,

Before you send it off, how about we try it on my HD100 when I get back from Jakarta? You may want to ship if off before then though.

Dan Weber
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