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How to disable to build-in mic on the DCR-TRV350 when video streaming through Firewire?

Hi everyone im recording with this model and the problem i have is this im using the firewire with a mac to get the video live and then im trying to use my mixer to get a better quality audio but the mic on the camera is always on so i get audio from there. i have tried to conect a mic throu the "mic in" of the camera and still i get audio from the built in mic. i dont know what to do anyone have a sugestion? my email is [email protected]

Manuel
Thu, 28 Feb 2008 05:12:45 +0000

In the TRV350 menu (camera or VCR mode, not memory mode) scroll and select tape set, (tape symbol, fourth one down), audio mode (second one down) select 16 bit, which forces a single channel of high quality audio using both tracks. Plug in an external microphone. That shunts the primary audio source by opening the mechanical leaf switch built into the microphone jack (as you have done). You can fabricate a dummy plug cut from a pair of broken or 99cent store headphones/earbuds. Functional headsets will practically act as a very poor-quality microphone (there is art to explore there, like 'bus depot announcer'.)

I was led to believe that one channel was unused, but Manuel's question indicates that perhaps plugging in the external microphone is the forward stereo channel and the rear channels are recorded from the built in microphone. Manuel's response presents the question; In 12 bit mode (two digital stereo channels,) does plugging in an external stereo microphone actually lay down quadrophonic audio?

To test for that, I connected the iLink cable for DV FireWire signal from the DCR-TRV350 camera to a Sony DVD recorder RDR-VX520, set the camera audio mode to 12bit, and set the DVD recorder to Stereo2. No DV audio was passed, in any camera mode; Memory, Camera or VCR. I have no tapes with channel 2 encoded so I couldn't test playback, I'll presume that will work.
When the DVD recorder was set to Stereo1 and Mix, the camera passed DV audio in all camera modes, with/without either/both left/right external microphone/line attached. (when using line voltage input, turn down the supplied volume to about 10%, any volume above that is recorded as pure distortion.)

Try your setup again, monitor the audio on the receiving device, and scratch the built-in mic with your fingernail. If you have a microphone/headset/earbud plugged in to the external mic jack, scratch that as well, I'll bet that's the source.

I can't reproduce your problem. A dummy plug in the external microphone jack blanks the audio just fine. As suspected, the camera doesn't record/playback(the tapes it recorded)/port Stereo2 DV audio, so if you can select that in your receiver/recorder/computer edit program, that will also blank the audio. Or try both.

Attached Image:

DV8-D8 Audio Input select menu on Sony DVD Recorder RDR-VX530.jpg

Disney Wizard
Thu, 01 Dec 2011 00:07:08 +0000

Attached thumbnail for cataloging.

Attached Image:

Thumbnail.jpg

Chieh Cheng
Fri, 16 Dec 2011 23:58:29 +0300

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