Why does wave sounds appear when the audio signal entering the Mixing console?

2018-11-01 16:03:51 Guangzhou Xunkong

When VGA signal and audio signal of computer access to the conference system, wave sounds will appear after the audio signal entering the Mixing console and disappear once VGA cable unplugs. How can we solve this problem? 

Generally, this problem is caused by signal grounding interference. You could add an audio isolator or a DI Box in the middle of the cable  between the two equipment to solve the grounding problem.