No idea with Hyper-V.
You didn't mention which ISO you were using, but perhaps try VirtualBox and see if you get the same results.
[OPEN] No sound in Hyper-V
Arch Wiki: https://wiki.archlinux.org
Arch Forums: https://bbs.archlinux.org
Active kernel releases: https://www.kernel.org/category/releases.html
Arch Forums: https://bbs.archlinux.org
Active kernel releases: https://www.kernel.org/category/releases.html