Wireless from a mixer to the camera

[Ty Ford]

Hi Allen,

Wireless from the board to your camera. Sure that’s possible. Here are thoughts:

1. You do need to make sure you have the mic or line setting correct at the transmitter. I’m pretty sure you know that, but other who read this might not. Audio mixers have many output holes to connect to other things. I have been at shoots where I was told “It’s a line output.” and it wasn’t, or somewhere in the gains structure of the console the level of the signal was somewhere between the two.

2. Some outputs change when the board op moves a fader. That’s bad because when that happens your levels also change. You want Pre Fader Outs that don’t change. Some low level mixers don’t have this capability.

3. A board feed, by itself, with no room mics, will sound incomplete. That’s because drums and amps create sound that’s heard by the audience in addition to the mix created by the board op that you hear through the PA.

4. Some on camera mics can not be attenuated low enough to prevent overloading at the camera. This is a side thought, but one way to “fix” the incomplete board feed is by adding time-corrected camera mic audio. “Time-corrected” because the sound moves at 1 millisecond/foot. The camera audio will be behind the board audio by however many feet (seconds) the camera is from the PA. Unless you resolve this timing issue, when you add the two, there will be phase cancellation that will make the mix sound pretty weird.

When you see live performances on DVD, the “professional ones” are the result of recording all band channels plus a number of room mics. That multitrack recording is then mixed and delivered as a stereo or 5.1 master that’s mated with the edited video. There’s a LOT going on.

Regards,

Ty Ford

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[Allen Zagel]

Hi
I appreciate all the information. I loked at that Lectro system and right now it’s way out of my proce range having just purchased the new Panasonic HPX-170 camera.

I got enough info now to research this.

Thanks again
Allen

ASX Media Group, Inc.
http://www.asxvideo.com
NEW DVD – Europe, Trains-n-Trams

[Brian Walker]

I have used a Zaxcom for a couple of years without fail.. Zaxcom’sstereo wireless system transmits two channels of audio using only one transmitter and one receiver It also records the audio at the transmitter, just in case the wireless feed goes bad.. Good Luck!
Brian

here is a link:
https://www.theultimatewireless.com/stereo_wireless.htm

[Allen Zagel]

Hi Brian

Oh! Cool. would you beliweve there’s one for sale at eBay?

Is this the system you were mentioning?

Item number: 190288542701

I notice there’s quite a few on Zaxcom’s site.

thanks
Allen

ASX Media Group, Inc.
http://www.asxvideo.com
NEW DVD – Europe, Trains-n-Trams

[Brian Walker]

That was the older unit, but yes, that is the system! I bought the newer version with the stereo adapter/recorder option.. Love it(except the cables should be at a right angle and not sticking straight out! Oh well…

[Clyde Villegas]

Hello Ty. I know this is a very old thread but I have the same question.

Since I don’t have an attenuator or a pad between the mixer and the transmitter, can I just lower the audio level coming from the mixer so as not to overload the transmitter’s microphone input? Is this safe for the transmitter?

Since the lav microphone is a condenser, does that mean the transmitter is sending voltage/phantom power to it? With the mixer-to-transmitter setup, is it safe for the mixer to receive phantom power from the transmitter?

ut in omnibus glorificetur Deus

[Brian Reynolds]

Hy Clyde,
No you can’t just lower the output level of the mixer.
The reason being is every electronic device has a ‘noise floor’ and there is no way of getting rid of that… by just lowering the audio level it may not over drive the input…… but the signal may be almost the same as the noise floor giving you a VERY ‘hissy’ signal.

You actually need to lower the signal AND the noise floor… a pad will do this.

[Ty Ford]

Hello Clyde,

Can you provide a list of gear by model number and the oder in which you want to connect them?

You have a mixer feeding a transmitter? Where is the lav plugged in and does it require phantom or just bias voltage?

What are you doing with the receiver?

What are you trying to do?

Thanks,

Ty Ford
Cow Audio Forum Leader

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[Clyde Villegas]

Hello Ty,

Some projects require us to document seminars. For this type of projects, I’m recording both audio and video to my Panasonic GH5. Audio is coming from the hotel’s mixer’s “prefader” aux-send so we can control the level independently of the front-of-house. Mixer is usually whatever the client has rented but sometimes we bring our small format mixer, the Behringer Xenyx X1204USB.

Since I’d like to go wireless, I’m thinking of using our wireless UHF lav mic, the K&F Concept M9 (It’s a great balance of good-enough-sound and client’s budget, especially here in Manila. It’s so new that there are no reviews yet on the internet). The M9’s transmitter uses an included condenser lav mic with a TRS plug. So I guess the transmitter is sending voltage to it (very sorry, I don’t know what bias voltage means). To connect transmitter to mixer, I’ll replace the M9’s condenser lav mic with a cable (1/4 TS TO 1/8 TRS) connected to the mixer’s prefader aux-send.

The order would be: mixer’s pre-fader aux-send, to M9 transmitter’s mic input, then wirelessly to the M9 receiver, which is then connected to my GH5’s mic input.

Many thanks in advance! God bless.

ut in omnibus glorificetur Deus

[Ty Ford]

Clyde,

You’re in Manila? Do you practice Ho’oponopono?

Now on to other things.

Bias Voltage is a 2-5 voltage used to power some electret condenser mics. It is NOT Phantom Power. Phantom Power is for externally polarized mics. You can not run a phantom powered mic with bias voltage. This is for your general information here.

Hard to say if your plan will work, but the only way to test is to try. Does the mic with the M9 have a TRS or a TS plug? If it has a TRS plug that MAY indicate that the transmitter is expecting a balanced input. It does not GUARANTEE that, however. You may have to fiddle around with the connections. It used to be that on a G3 Sennheiser tip and ground were for mic and ring to ground were for line level. (or vice versa). I never had to deal with the issue, but you may have to in figuring out the best input plan.

If the M9 mic has a TS plug then audio to tip and ground to sleeve should work.

Any questions?

Ty Ford
Cow Audio Forum Leader

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