Audio access from LXC container on Optiplex

[JimLS]

Wanting to play some short wav files from the container. I tried installing alsa-base but package was not found:

root@proxmox1:~# apt install alsa-base
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package alsa-base

I did install alsa-utils and got no errors.
Here I expected to find more listings:

root@proxmox1:~# ls -l /dev/snd
total 0
crw-rw---- 1 root audio 116,  1 Dec 18 01:13 seq
crw-rw---- 1 root audio 116, 33 Dec 18 01:13 timer
root@proxmox1:~#

Here is some other info:

root@proxmox1:~# lspci | grep -i audio
00:1f.3 Audio device: Intel Corporation 100 Series/C230 Series Chipset Family HD Audio Controller (rev 31)
root@proxmox1:~# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 10c4:ea60 Silicon Labs CP210x UART Bridge
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@proxmox1:~#

This is different than the guides I have found on setting this up. How do I set up to have aplay work in the container?
When I run aplay on the host it doesn't find the hardware:

root@proxmox1:~# aplay -l
aplay: device_list:274: no soundcards found...
root@proxmox1:~#