It came the time of the year I have to shoot my instructional video so I made a test with my set up.
To my surprise (or should it be surprise?) I've got the sound glitch problem again!

For reference check out this old posts:
http://www.dvinfo.net/conf/showthread.php?s=&threadid=25817&highlight=glitch
http://www.dvinfo.net/conf/showthread.php?s=&threadid=29857&highlight=glitch

Same thing like before this time using external stereo mic (AT9440) - happens mostly in left channel randomly.
Thinking hard I came up it might be something wrong with the location - magnetic or radio interference or the like. So I went the next day and made short test shot in the exact hall I'll be shooting - this time no glitches! The only changes from the previos day - new tape that I ff and rw to ease the tension. Also no tripod (could it serve as antena?) and no music (coming from portable PA system conected to portable MD I'll use on set).

If anyone is interested I'll prepare short sample tonight.
It's not crucial if it ocures on the day of the shot cause I have the original tracks but I still want to capture enough room acoustic and sounds like announcements and foot taps on the floor, etc.

I've exchanged few mails with Mike Cecotka and here's what he experinced.

Quote:
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Yes it's the location at least in my case
Camera is sensitive what I think to wireless internet
router 3com to be exact.

I was going mad thinking about supernatural :)
I would get noise in my apartment then everything
great on location.

You can be sure only if you listen to recorded tape
since electronic noise is not detecible over
headphones during recording.
*********************************

Any thoughts on that? I wonder if mobile phones (in Japan it's different than GSM) can cause also interference? I have to check but there might be transmiter close to the location.