Moving files:

wireplumber/wireplumber.conf.d/alsa-vm.conf

@@ -0,0 +1,23 @@
+# ALSA node property overrides for virtual machine hardware
+
+monitor.alsa.rules = [
+  # Generic PCI cards on any VM type
+  {
+    matches = [
+      {
+        node.name = "~alsa_input.pci.*"
+        cpu.vm.name = "~.*"
+      }
+      {
+        node.name = "~alsa_output.pci.*"
+        cpu.vm.name = "~.*"
+      }
+    ]
+    actions = {
+      update-props = {
+        api.alsa.period-size   = 1024
+        api.alsa.headroom      = 2048
+      }
+    }
+  }
+]