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Old November 12th, 2010, 12:01 PM   #1
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HMC40+1/8" mic adapter

hello,

I'm using an HMC40 with a shotgun mic attached via an 1/8" adapter. It seems that this setup automatically disables the 2nd channel of audio and is only seeing/recording the shotgun on Ch. 1, but is not seeing/recording the onboard mic on Ch. 2 (which is what I'd like it to do).

I must have something set incorrectly, but cannot figure out from troubleshooting or the manual what that might be.

Thanks for your help!
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Old November 12th, 2010, 12:16 PM   #2
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Dina,

The shotgun mic is mono, and the XLR- 1/8" adapter is probably mono only as well, which is why you only get one channel. I'm sure it's been covered on here before if you search. I don't think the HMC4x has a menu setting to duplicate the audio channel.

You would need a lead that provides audio to both stereo channels via the 1/8" jack. I'm not sure what it's called, I use the XLR unit on my HMC41, which also allows me to record the shotgun mic onto two channels at two different levels, so I can cope better with unexpected loud sounds, for example.

Maybe something like this:

Hosa Technology Stereo Mini Angled Male to 3-Pin XLR XVM-105F

"This Hosa Stereo Mini Angled Male to 3-Pin XLR Female Cable is specifically wired to convert a mono microphone or line level signal to both left/right contacts of a mini 3.5mm (1/8") stereo plug. This allows microphones and mono output devices to be connected to the stereo inputs of camcorders without phase cancellation and single channel operation."
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Old November 12th, 2010, 12:28 PM   #3
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Thank you, Mike.

I do understand that both the shotgun and jack are mono. I was more so wondering if there was a way to set the camera to record the shotgun to one channel and the onboard mic to the second channel, like you can with other cameras like the HVX200.
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Old November 12th, 2010, 02:36 PM   #4
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Sorry Dina, I always try to cover the bleedin' obvious!

I think the channel replication is only available for XLR - I think the HVX is all XLR? No software option for our HMC-tinycamera people that I know of.
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Old November 12th, 2010, 08:50 PM   #5
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Hi Dina

Inside the 1/8" socket in the camera is a connector that disconnects the internal mic completely when you push a jack plug into the socket!! The only way to bypass it would be to change the socket.

However what you can do is remove the 1/8" mono plug from the mic cable and replace it with a stereo one and then bridge the two live terminals so you mic output is fed into both camera channels.

The other option is to use a stereo to mono splitter which is essentially a 1/8" stereo jack plug on one end and two mono sockets on the other. That way you can feed your shotgun into one mono channel and a second mic of your choice into the other to "use" the second channel.

If you had something like a Rode Stereo mic then it would feed both channels for you...probably the nicest option??? Azden also make a stereo shotgun mic that will also feed both channels.

Chris
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Old November 18th, 2010, 05:21 PM   #6
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My Rode Videomic records to both channels

...on my HMC-40 using the 1/8 jack. I didn't have to go into the audio menu to set anything, it worked that way right out of the box.
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