Has anyone ever encountered a noise like this in recording?
I recorded sound on a video shoot a few days ago. When we got back to the studio, all tracks had this weird, chirpy background noise in them. You can hear it below.
http://charlesflynt.com/chirpy_artifact.mp3
Also, here is the spectral display from Audition of the same clip.
You can see the artifact clearly. I have no idea what we did to produce this and I have not been able to reproduce it. My field recording equipment is: Azden MX 100 shotgun mic, feeding into an Azden FMX-42 field mixer, which is hooked up to a Tascam DR-40 digital recorder. I use all high quality XLR cables.
I used the Sound Remover effect in Audition to try and remove it. It did a decent job. But it left the voice recording sounding a bit strange. So I had to hide that with some background music.
Can anyone tell me what caused this and how to avoid it in the future?