Ft8 and vox

[Luca66]

Hi all, as other users have reported, I observed that enabling vox there is a noise/rumor. This is a problem because affect the rx signal.
Can a solution be applied today that reduces the problem?
I recently started using Ft8cn by combining an external audio interface between tr usdx and smartphone.
The system works but I would like to eliminate the disturbance. Thanks for any advice you can give me. 73 Luca.