Problem with SDI out - sound too hot and no way to adjust?

I've never heard of SDI audio being different than other audio from a camera. I took a look at a couple of those YouTube videos, and the audio is pretty scrambled up. Are you sure there weren't just audio problems in general, and the SDI was just passing along the problematic audio feed?
 
Now that the event is over check your cameras audio with a mic attached and see if you still have issues. I bet the feed was hot.
 
I was feeding the image via SDI to the editor while shooting, he was hearing it very hot, I had some control from the sound dials on the camera but they were just a click above off, just dosen't feel right? I checked the sound recorded to the SD card, it was low but clean. Are there any SDI sound menu adjustments I should know about with the AF100?
 
Don't know how you were recording but was it a line level vs mic level issue. For example if you were feeding the cam a line level signal (from a mixer) but the cam was set to receive mic level, your audio would be very hot indeed.

Grant
 
ggrantly said:
Don't know how you were recording but was it a line level vs mic level issue. For example if you were feeding the cam a line level signal (from a mixer) but the cam was set to receive mic level, your audio would be very hot indeed.

Grant
Click to expand...

And distorted!
 
To really make this thread mean something you need to be specific about each link in the audio chain -- what mic or feeding source, what settings, etc.
 
If the sound on the SD card is clean but low, and the pots were almost off like you say, that sounds like line audio fed to a mic input.

And the SDI audio fed from the camera to the editor- is SDI audio line level?

What were the audio input settings for the editor?
 
ggrantly said:
Don't know how you were recording but was it a line level vs mic level issue. For example if you were feeding the cam a line level signal (from a mixer) but the cam was set to receive mic level, your audio would be very hot indeed.

Grant
Click to expand...

This is a good point.
Let me explain the chain- Rode NGT III via XLR to camera , have switch next to plug set to mic, I am going SDI into my TVLogic then from the TVLogic to the editor via SDI. There was no mixer involved. The editor was using a Samuari to capture the files and something called Q-Take to place the background behind the talent.
I switched out all the cables, XLR - SDI the only thing I didn't change was the mic.
Keep in mind this audio has much ambient noise because we were shooting in a Best Buy full of noisy people.
The client was happy with what went up to YouTube, I'm just perplexed.
 
That was a really great idea for this job to promote this event/ store. Whoever came up with it, kudos to them. I looked at your other work on Vimeo and I really liked the insurance and school promos. They were done really well and especially the interviews in the school one looked great. Something I'm going to watch again and "take notes" on (was that on the AF? What lens?). So don't take this as a critique, because it's not one. But the audio sounded "off" in the videos. All of the Youtube ones. I noticed it in parts on the insurance video, too. At :47, when the man starts speaking, it "sounds off". Whereas when the woman was speaking, it sounded normal. I put on a decent set of headphones and it sounds like maybe, just maybe the left channel has more echo than the right channel. At first, I was thinking that there may have been a slight delay in one of the channels. But it's definitely something that isn't the same from the two channels. Were you recording separate audio sources to each channel?

Now my ears may just be playing tricks on me, but that was my thought, so I wanted to share in case it did help.
 
Hey Brandon,

thanks for the kind words. I looked at the insurance video, the footage you are looking at -at :47 is b-roll without sound, they used VO from other parts of the video, the problem is their mouths are moving while dialogue is coming from another source.
I think I answered your questions about the school promos.
The kids where shot with a 5DMII, slider and I think we had a zoom on the camera so I can't be sure what lens.
The Graham Windham live action was shot with my old reliable HVX200, all on green screen, lots of post work.
 
The Rode mic has a -36dB output and the highest setting on the camera is -50dB. You would be well advised to put a small pad (Shure makes one as I am sure there are others) in-between the output of the mic and the input of the camera. You are just simply overdriving the circuit.

Hope this helps.

Jan
 
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