echo while monitoring audio from head phone jack

C

chancenorris

Active member
Anyone experiencing echo while monitoring audio and if so how did you correct it?

1)My setup was Sennheiser ew100 G3 wireless receiver / transmitter.
2)ch1sel = input1 connected to wireless receiver
3)ch2sel = input2 not connected
4) Audio input1 = on
5)Audio input2 = off


in menu not sure what mic ALC does but it is set to on
 
you should run your wireless into input 2, then set chan 1 and 2 to input 2 and run chan 1 a little lower than chan 2 for safetly.
 
Brian@202020 said:
ALC = Automatic Level Control.
Click to expand...
Not in the AF100. In consumer cams or the HMC80, you'd be right. But in the AF100 and the rest of the Panasonic pro lineup, ALC = Automatic Limiter Control.

The difference is that the ALC in these cameras isn't a level control and it won't pump up your audio during quiet scenes. You won't ever experience the "pumping" effect. All it will do is clamp down a limiter when the audio starts to overmodulate. It'll pull in the reins (sort of like a knee). If you wanted to compare them to exposure, Automatic Level Control would be equivalent to autoexposure, whereas Automatic Limiter Control is more like an auto knee. It doesn't affect your overall sound, it just yanks down the dangerously-loud portions.
 
Barry_Green said:
Not in the AF100. In consumer cams or the HMC80, you'd be right. But in the AF100 and the rest of the Panasonic pro lineup, ALC = Automatic Limiter Control.

The difference is that the ALC in these cameras isn't a level control and it won't pump up your audio during quiet scenes. You won't ever experience the "pumping" effect. All it will do is clamp down a limiter when the audio starts to overmodulate. It'll pull in the reins (sort of like a knee). If you wanted to compare them to exposure, Automatic Level Control would be equivalent to autoexposure, whereas Automatic Limiter Control is more like an auto knee. It doesn't affect your overall sound, it just yanks down the dangerously-loud portions.
Click to expand...

Good to know, but regardless it should still be set to off if you can.
 
Brian@202020 said:
Go to "AV IN/OUT SETUP", then scroll down to "HP MODE" (Headphone mode), and then change it to "LIVE".
Click to expand...

Barry, I think you should add this to your "Tips and Tricks" sticky. Its come up a few times, and I'm sure it'll come up again.
 
chancenorris said:
4) Audio input1 = on
5)Audio input2 = off
Click to expand...

The on/off switch is for phantom power. It you're using wireless lavs you should leave phantom power off. What you want to set is the CHAN 1 and CHAN 2 select switch to the input you're using, either INT, INPUT 1, or INPUT 2 for CHAN 1 and either INT or INPUT 2 for CHAN 2.


manglerBMX said:
you should run your wireless into input 2, then set chan 1 and 2 to input 2 and run chan 1 a little lower than chan 2 for safetly.
Click to expand...

With wireless lavs it's a line output from the receiver. Setting one channel lower than the other will not prevent peaking or clipping of audio because that's coming from the wireless transmitter. With the G3, set your wireless transmitter to a lower level like -12 or a level suitable for the loudness of the dialog, and the receiver to a higher level like +12. I typically run my lav transmitters between -15 and -30 depending on the situation. This helps prevent peaking and clipping from the wireless lav. Then make sure the switch on the input you're using on the AF100 is set to LINE and not MIC.
 
Mike@AF said:
With wireless lavs it's a line output from the receiver. Setting one channel lower than the other will not prevent peaking or clipping of audio because that's coming from the wireless transmitter. With the G3, set your wireless transmitter to a lower level like -12 or a level suitable for the loudness of the dialog, and the receiver to a higher level like +12. I typically run my lav transmitters between -15 and -30 depending on the situation. This helps prevent peaking and clipping from the wireless lav. Then make sure the switch on the input you're using on the AF100 is set to LINE and not MIC.
Click to expand...

if you're setting your tx or rx so that its less sensitive, then you're going to have to run the gain on the camera a littler higher, thus providing the opportunity to over modulate the camera, therefor needing to run another channel a little lower.

its just habit doing that when i'm doing a one mic to camera scenario
 
manglerBMX said:
if you're setting your tx or rx so that its less sensitive, then you're going to have to run the gain on the camera a littler higher, thus providing the opportunity to over modulate the camera, therefor needing to run another channel a little lower.
Click to expand...

No, that's why you set the receiver to +12db. You lower the output on the transmitter and set it higher on the receiver's output. It doesn't increase the risk of overmodulation, and in fact lowers the risk because you have more headroom and adjustability on the microphone.
 
Mike@AF said:
No, that's why you set the receiver to +12db. You lower the output on the transmitter and set it higher on the receiver's output. It doesn't increase the risk of overmodulation, and in fact lowers the risk because you have more headroom and adjustability on the microphone.
Click to expand...

Im going to try it, sounds interesting
 
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