diff --git a/Documentation/components/audio/index.rst b/Documentation/components/audio/index.rst
index 0f1ccd2c9ea..7191c5996cb 100644
--- a/Documentation/components/audio/index.rst
+++ b/Documentation/components/audio/index.rst
@@ -119,3 +119,9 @@ Related Subdirectories
 
 * ``drivers/audio`` - Contains the lower-level device specific drivers.
 * ``apps/system/nxplayer`` - User-mode audio subsystem interface library.
+
+Related Pages
+=============
+
+* :doc:`/components/drivers/special/audio`
+* :doc:`/applications/audioutils/index`
diff --git a/Documentation/components/drivers/special/audio.rst b/Documentation/components/drivers/special/audio.rst
index bc03c10b7b4..3249c8de105 100644
--- a/Documentation/components/drivers/special/audio.rst
+++ b/Documentation/components/drivers/special/audio.rst
@@ -4,3 +4,41 @@ Audio Device Drivers
 
 See ``include/nuttx/audio/audio.h`` for interface definitions.
 See also the audio subsystem at ``nuttx/audio/``.
+
+Audio Tone
+----------
+
+This driver has an interfaces which accepts a PWM lower-half and a oneshot timer
+lower-half. Its features are enabled by ``CONFIG_AUDIO_TONE=y`` You can register
+a tone driver as follows:
+
+.. code:: c
+
+   #include <nuttx/audio/tone.h>
+   #include <nuttx/timers/pwm.h>
+
+   /* Somewhere later in the code */
+
+   int err;
+   struct pwm_lowerhalf_s *pwm;         /* Assume initialized */
+   struct oneshot_lowerhalf_s *oneshot; /* Assume initialized */
+
+   /* Here, the argument '1' is the PWM channel to use */
+
+   err = tone_register("/dev/tone0", pwm, 1, oneshot);
+   if (err < 0)
+     {
+       syslog(LOG_ERR, "Couldn't register /dev/tone0: %d\n", err);
+     }
+
+The PWM interface generates the tone output, and the one-shot driver is used to
+get the timing of musical notes correct.
+
+If you want to try playing sound after the device is registered, you can write
+`Music Macro Language (MML)
+<https://en.wikipedia.org/wiki/Music_Macro_Language>`_ to the character driver.
+For example, here is how you would play Ode to Joy:
+
+.. code:: console
+
+   nsh> echo "L8eefggfedccdeL6eL16dL4d" > /dev/tone0