Hi Jim,
Thank you for your answer!
The Devialet has values > 0. Lowest value is 50 ms. I tried higher values on the Devialet site and also for buffering in JRiver. The value of ~ 1.5 seconds delay varies then in the order of 100 ms. With 50 ms on both sites there is no stuttering.
Personally I think its the switch D-Link DGS-105 or the network (adapter) causing the long delay.
I will try the following:
I have a Intel LAN card in my office and will put it in in my HTPC as an exclusive LAN port for the Devialet, put the Devialet and HTPC with JRiver in its own subnet and give them fixed IP adresses without using DHCP. The Qualcomm port on the MSI Motherboard will then be used for Internet access within a different subnet and using DHCP. Will take some time. Currently very busy on my job.
Best Regards
Manfred