diff --git a/docs/index.rst b/docs/index.rst
index 752f518..cc598b2 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -4,6 +4,7 @@ RTFD
 .. toctree::
    :maxdepth: 2
 
+   public/alsa/index
    public/ansible/index
    public/apt/index
    public/apt-mirror/index
diff --git a/docs/public/alsa/index.rst b/docs/public/alsa/index.rst
new file mode 100644
index 0000000..3a23d88
--- /dev/null
+++ b/docs/public/alsa/index.rst
@@ -0,0 +1,18 @@
+alsa
+====
+
+* /var/lib/alsa/asound.state
+
+Unmute microphone
+-----------------
+
+.. code:: shell
+
+ amixer -c 1 set Mic 100% unmute
+
+Save settings
+-------------
+
+.. code:: shell
+
+ alsactl store