I've been trying to record the conversations and radio transmissions on my video camera (Canon HFS10) with a patch cord that looks like this:
But I'm picking up a lot of noise even when nobody is talking and I'm hoping to get rid of it. I've seen other patch cords advertise that they convert the 600 omhs headset signal to something more suited for a regular 3.5 mm recorder.
Might this be the source of the noise? I'm not sure if the cord I currently have does this, so I've included a small recording where you can hear the noise:
http://luftfartsfag.no/example.wma
The aircraft in question is a Cirrus SR20 with a Garmin GMA 340 audiopanel.
Any information and help on this subject would be most appreciated.