Set up multiple sound server options for FreeBSD.

ansible/roles/sound/tasks/freebsd_jack.yaml

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+# Jack users must be added to the realtime group.
+# Also set memorylocked to 128M in login.conf
+# D-bus should be enabled for auto-launching jack.
+- name: Install loader.conf
+  copy:
+    src: "files/{{ item }}_loader.conf"
+    dest: "/boot/loader.conf.d/{{ item }}.conf"
+    mode: 0644
+    owner: root
+    group: wheel
+  loop:
+    - realtime_priority
+
+- name: Install packages
+  package:
+    name:
+      - jackit
+    state: present
+
+- name: Install packages
+  when: install_graphics
+  package:
+    name:
+      - qjackctl
+    state: present
+
+# hw.snd.default_auto=0 # (2)
+# hw.snd.default_unit=1 # (3)
+
+# hw.usb.uaudio.buffer_ms="2"
+
+# hw.snd.latency=0
+# hw.snd.latency_profile=0
+
+# Hurts battery:
+# kern.timecounter.alloweddeviation=0
+