Obs recording have buzzing noise randomly

[PHDaniel42]

I have notice a buzzing noise recently happen in 2 of my long recording. At first I thought it was grounding and what not but I cant find anything wrong with my hardware. Then this next project and it get the same buzzing noise at 13 minute mark and drag on to the 19:30 mark.

I would post a drive link afterward, didnt knew my audio is too large to post on the forum

 

[PHDaniel42]

audio test.mp4

drive.google.com