Live multicamera video - sound advice needed!

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Re: Live multicamera video - sound advice needed!

Post by ChrisFelixstowe »

Taken me time to get back to you, but I have to say that I'm really pleased that I followed Mike's suggestion and bought the pair of Boya lav mics wired to a single power pack and jack. It got over all my echo probs, and I ran it into a Podtrak 4 podcast/mixer device which boosted the signal into the final video mixer.
I got good feedback from the live show, and am delighted to give you all my sincerest thanks for your kind help!
Here's a link to the Facebook recorded version:

https://fb.watch/665K-8BOB4/
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Re: Live multicamera video - sound advice needed!

Post by blinddrew »

Sounds good, still a bit of 'room' in there but perfectly clear and audible. :thumbup:
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Re: Live multicamera video - sound advice needed!

Post by AlecSp »

*So* much more listenable to than before. Amazing, considering this is the same room as before - was the room treated this time?

But there's more you can do - get more voice and less room just by wearing the lav mic higher - it was practically on your belly! Take it up by two buttons and you're practically halving the difference between the mic and the sound source. Cost £0, impact appreciable.
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Re: Live multicamera video - sound advice needed!

Post by Tim Gillett »

If listening on a wide range system (ie: good fidelity) very boomy, bassy voice, especially the interviewee on our left. It's crying out for some EQ to make it sound more natural, intelligible and easy to listen to. Compare the seaside interview (14:33) where the voices are clear and natural sounding, even accounting for the room contribution.

Maybe heavy Denoising has wiped out much of the speech highs, leaving the remaining bass too strong by comparison.
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Re: Live multicamera video - sound advice needed!

Post by ChrisFelixstowe »

Thanks, all. TBH, I though it worked out not too badly - at least the audience could hear what was said! :D
Will move the mics up as suggested, and see how that goes.
There has been no sound treatment on the room, although the owners are thinking about what they want to do - the level of echo is simply too much for people in the room.
There's no denoising or any sound treatment at all in the system - I don't really know what this means other than on a post editing system like Vegas.
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Re: Live multicamera video - sound advice needed!

Post by Tim Gillett »

ChrisFelixstowe wrote: ...There has been no sound treatment on the room, although the owners are thinking about what they want to do - the level of echo is simply too much for people in the room.

OK, it might have helped if initially you had mentioned that the venue has such severe reverberation problems.

As mentioned initially, standard directional stage vocal mics on desk stands, aimed at the speakers' mouths, and reasonably close, have a much better chance of giving good speech clarity and minimising very bad venue noise as you obviously have there.

Lavs are at somewhat of a disadvantage because they miss much of the clear, direct sound from our mouths, often being placed in a kind of voice shadow. Plus they pick up chest vibrations which tend to obscure the speech clarity as well. Targeted EQ can be improve things but lavs are always at a disadvantage re more direct micing. Much of the problem is the compromised placement.

Also if the lavs are directional, they will pick up less room noise than if omni directional but they need to be oriented with their directional end pointing the right way of course.

ChrisFelixstowe wrote:There's no denoising or any sound treatment at all in the system - I don't really know what this means other than on a post editing system like Vegas.

To my ears it's either a Denoiser or a very low bitrate recording or perhaps a bit of both.

I use Vegas. I think it has a Denoiser or perhaps a Noise Gate always open on audio tracks. The first thing I do when I get into effects plugins is to switch it off.

You certainly have a tough acoustic to work in. All the best with it.

Tim.
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Re: Live multicamera video - sound advice needed!

Post by Mike Stranks »

Hi Chris!

Just had a quick look...

As has been mentioned, get those mics up higher... 1st shirt button! :)

First suggestion: apply a high-pass (lo-cut) filter at about 100Hz with a fairly steep curve... there's nothing below that frequency in the human voice that's of the slightest interest.

Second suggestion: get some acoustic treatment in that room. I'm a great believer in these:
https://www.studiospares.com/acoustics/acoustic-panels/acoustic-panel-1200-x-600mm-beige-465230.htm Various sizes and colours available in that range.

There's more that could be done, but you're well on the way! :thumbup:
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Re: Live multicamera video - sound advice needed!

Post by Tim Gillett »

There is nothing in the interviewee's voice below 100 Hz. The voice (and the room resonance) is boomy from above 100 Hz up to the 500's, perhaps higher. I would gently roll off bass starting from roughly 1000Hz. Maybe 5 to 10 db down at 100 Hz.
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Re: Live multicamera video - sound advice needed!

Post by AlecSp »

Tim, I think you missed the early part of this thread, where we covered a load of this, along with the original video that was almost unlistenable to with too much room.

The latest version is oodles better, and just repositioning of the lav mics (free and quick to achieve) will probably get close enough.

We know the room is nasty. Cheap acoustic panels will do a lot (modest cost), as would a couple of hung duvets (free) - though the mic placement has delivered most of what's needed.

Point taken on the EQ on the lav mics - there's no problem on the kind of kit most people will use for content like this, though., though - if you have a HPF (high pass filter, a.k.a. low cut) on the mixer channels, press it in. If you don't have a HPF, then maybe it really isn't worth worrying about.
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Re: Live multicamera video - sound advice needed!

Post by Tim Gillett »

AlecSp wrote:Tim, I think you missed the early part of this thread, where we covered a load of this, along with the original video that was almost unlistenable to with too much room.

I was in on the thread from the start.

AlecSp wrote:The latest version is oodles better,...


It's not the lavs themselves that are reducing the room reverb.

Any closer placed mic will sound better than it did further away.

We have not heard what stage vocal mics would have sounded like close to and in front of the speakers, only the lavs closer. Not a fair comparison.
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Re: Live multicamera video - sound advice needed!

Post by Mike Stranks »

Tim:

I think you may not be taking full account of the fact that this is audio for video.

While it's undoubtedly true that using directional mics close to the speakers' mouths will ameliorate some of the room effects, they will also detract from the 'video experience' for the viewer.

IME experience audio-for-video is nearly always a compromise between what would be best/better and what looks good and non-intrusive on camera. I was shooting a significant video on Sunday. I had to compromise significantly on mics and placement, which I would not have had to do if I was just concentrating on the audio side of things.

And a general point for all video-makers, community radio people, podcasters with guests etc etc etc.:

We take sitting at a desk - or wherever - with a mic and associated ironmongery in front of us as a given. And that's not to mention all the other gubbins often associated with capturing sound. To the average 'studio' guest it's often both a bit bewildering and somewhat intimidating. They're already nervous, and plonking them in front of gear only ratchets that up. Unobtrusive is good if it enables the guest to give of their best. Somewhat simplistically, quality of content allows comes before pristine audio.

Chris: You're doing well; you're on the right path; keep up the good work! :thumbup:
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Re: Live multicamera video - sound advice needed!

Post by blinddrew »

Just a big +1 for Mike's last point about nervousness.
We've got a director at our place who's a great public speaker; confident, amusing, outgoing, sociable, with nice clear diction to boot. (Shame about the Yorkshire accent ;) )
He regularly does little straight-to-phone updates for his area of the business and you can see he's relaxed and confident doing them.
Just before lockdown we needed to do some filming for an external video, so it was a bit more formal: lights, 2 cameras, separate mic. Nothing fancy by the standards of many here, but he walked into a room with half-a-dozen bits of kit arrayed in front of him and you could see him visibly tighten up.
I set the cameras going and it then took me about 10 minutes to get him to relax enough for a couple of takes.
And then I did the old, "We've got a couple of good takes in the can so I've got plenty to work with, fancy doing one more for luck?" Which was, of course, the one we used most of. ;)
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