Buzzing sound when recording

[Cecilia]

I updated my Gecho V2 yesterday to the latest firmware, everything works besides I now hear a buzzing sound when I push the set-button when recording like something vibrate. The buzzing stops when I finish recording. I cannot hear that sound on my previous recordings before the update.

[mario]

Hi! Is the buzzing now present in recordings? If yes, can you send me an example wav? (via email or upload it here, short files should work). Also, can you try another SD card, to find out whether the problem is related to current state of the card (might need to be reformatted) or the firmware. You can also try to revert back to old firmware to be sure that the problem arises only in the new version

[Cecilia]

Thank you for the different troubleshooting suggestions.
I test. And also send you an example of the buzzing sound

[Cecilia]

Problem solved. The problem was the batteries, nearly out of power, they created the buzzing sound. When I connected the USB power adapter everything works fine again.

[mario]

Ah, good to hear it was just that!  Thank you for the update!