Audio Drift

[KevinH]

I'm experiencing an audio drift on my live stream that increases over time from zero (at start) to about 6 seconds of audio delay about 30-min into the stream. Video remains a good quality, but audio is lagging. I am using a Blackmagic ATEM Mini Pro as the video switcher with the audio source plugged into the mic 1 of the ATEM switcher.


Any advice is appreciated.

 

[KevinH]

I figured out when my audio lag is introduced. The ATEM connects to the Laptop via USB. During a live stream, the ATEM is sending data to the laptop via the USB port to get the stream data into OBS. When I launched the ATEM Software on the laptop that was also running OBS, the audio lag was introduced (sometimes). I suspect the ATEM Software on the laptop is raising interrupts on the port which is impact some of the data flows... but for me only the audio stream was impacted. Hope this helps someone out.