High UDP communication latency because of audio rendering (Windows, C++)

Question

I am trying to communicate with an external robot at 1 kHz using UDP protocol with WinSocket library. I am using Windows 10 Pro Version 21H2. In the hardware side, I use a pc with intel core i9 10900X 32 GB RAM and Intel I219.

At a certain point it work pretty well, I did measure the time spent for the communication (both sending and receiving the packets sequentially takes between 200 microseconds and 500 microseconds), and I did also measure using wireshark the number of packets exchanged (1000 packets sent per second and 1000 packets received per second too). The throughput sending is 2 Mbps and receiving is 3Mbps.

The issue start when any audio is rendered (even the sound happening when changing the volume on windows), this lead to a noticeable latency (about 10 to 15 milliseconds). When I stop the Windows Audio Service, this solves the issue but in our application, we need to render a sound permanently.

graph : round trip time and frequency vs index of udp query, using NIC PCI

A temporary solution was to use a USB/Ethernet adapter instead of NICs. Using this type of device we have no latency but we already experienced in the past some issues related to drops of performance due to thermal throttling.

graph : round trip time and frequency vs index of udp query, using USB/Ethernet adapter

I also did try to reduce the audio process priority, no difference. I also tried to set the affinity mask of the audio service in different threads than my application, no difference neither.

My questions : is there a way to increase the audio latency in order to prioritize the udp communication or to reduce the latency of the udp communication to meet our need of 1 kHz frequency.