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I can only hear the left channel on some audio after xfer

by frankzxcv / November 8, 2004 2:07 PM PST

hello, maybe someone can throw some objective light on this,

hardware: sony trv 38 handicam, with both its built in mike, and a sennheiser shotgun mike.

when I am recording with either microphone, I hear fabulous "stereo" sound in the headphones. (that is, the sound is equal in both ears, that's with either mike). same deal when I play the tape back in the camera, it also sounds fine, and balanced in headphones.

WHEN I XFER THE FOOTAGE to my PC using adobe premiere, the sound is okay with anything shot with the camera's built in mike, but the stuff shot with the shotgun mike only has audio in the left channel.

(tapes from other professionally dubbed sources also have fine stereo audio when xferred.)

the only thing I can think of is, this shotgun mike is mono, but when I'm shooting the camera is sending a "mono mix" to both ears, making me think I'm recording in stereo. is this so? or it is something more sinister?

--fj

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That would be my conclusion. I am assuming that you
by Kiddpeat / November 9, 2004 6:37 AM PST

cannot use both mics at the same time. Thus, your transferred audio has no sound in the right channel. If that's the case, it should be a simple matter to copy the left channel to the right channel, or to send it to both output channels in Adobe Premier.

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wisdom
by frankzxcv / November 11, 2004 12:02 PM PST

yes, well i figured out that

1 this is a mono mike and it only goes to left channel

the camera has an automatic compensator which makes one channel of audio sound like stereo in camera headphones, hence my initial confusion,

but on the tape i really only have audio on one channel.

but since posting i learned of the "copy left channel" feature of premiere that makes it stereo.

one more piece of the puzzle! thanks - fj

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more wisdom
by frankzxcv / November 14, 2004 1:40 PM PST
In reply to: wisdom

okay, I have learned that this trv 38 camera has 2 audio modes: 12 bit and 16 bit. in 12 bit, there are really FOUR audio channels (or 2 stereo channels, allowing you to do audio editing in the camera). in 12 bit, the mono mike signal is sent to ONE of the 2 "stereo" channels, which when xferred to dv becomes only one left channel.

when placed in 16 bit mode, there are only 2 channels of audio instead of four. the mono shot gun mike signal is sent to both channels. audio then xfers to PC as stereo, or at least, 2 channels of same mono signal.

--fj

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