Sorry for the delay.
Yes I think it's sound card.
The sound card I was using is a 4 channel mixer, with us interface, so it was transmitting and receiving over a old usb socket.
I tried plugging in a usb mic, and it was ok.
My PC's are....
I3 12 meg ram and SSD, my other is it 16 meg ram and data drive.
I have only tried it so far on the it machine, when I get time I'll try the other.
Thanx for the help.
Roy


Geekom Mini-pc
Intel i5-8259U
16,0 GB RAM 64-bit Windows 11 pro
Acer V15 Laptop
Intel i5-5257U
16,0 GB RAM 64-bit Windows 10, x64
Acer 5750 Laptop
Intel i3-2310M
6.00 GB RAM 64-bit operating system, x64