[Sergiu Timar]

You might have a fundamental misunderstanding of what happened and it may be due to the fact that you haven’t read the first post. I had the Zoom H4n connected to my DSLR and I was recording, saving the data, only on the SD card from the camera.

[Sergiu Timar]

I wasn’t recording on the SD card from the device, I was recording on the SD card of the camera only.

After a bit of research online, I found out that someone had this problem too:

Hello Juan, Thanks for the sharing your details on how you set up your Zoom 4n. I tried your method and ran into a strange problem: When I came back and started inputing my 5D footage, one of the sound channels would sometimes have sound from a previous sound recording, instead of the actual sound. Really weird. Have you had anything like this happen? I’m trying to recreate it now.
I set it up pretty much like you had it. In my case:
I used both the Zooms XLRs (one with a mic and the other for wireless). I connected the Zooms sound to the 5d like you did with the line out from the zoom.
Also, how are you matching the sound levels of the zoom to the 5D? I did it manually, and have to turn the 5D sound level almost all the way down.
Reply

Juan Pons Says:
April 13th, 2010 at 8:52 am
Lucian,
Sorry for taking so long to respond. That is indeed a strange problem about the mixing of channels and previous recordings. I would suggest installing the latest firmware on the H4n which you can get from herehttps://www.zoom.co.jp/english/download/software/h4n.php.
In regards to the sound levels. You may need to lower the sound to the lowest settings or even set the audio out to line level.

https://dpexperience.com/2010/03/18/recording-audio-with-your-video-dslr-part-ii/