Source: HP Elite Book
Audio Endpoint: Dell Opti Plex 780 | Win7 64bit | 4GB RAM | Kingston 96GB SSD | NIC Intel Server Dual Pro 1000T
Switch: HPE Aruba 2530 with 23/24 ports in a static lag, port 1 to Source and everything in VLAN2
DAC: Emotiva DC-1
Transducers: ATH-m50x and AKG 701
Here is the video
Synopsis: You can play back audio even without cabling into the switch due to buffering. So the switch isn't affecting anything since you are listening to audio streamed out of application buffer.