diff --git a/Makefile.am b/Makefile.am
index 378dbca2..a364d4c9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -337,7 +337,8 @@ doc_files = doc/overview.txt doc/ofono-paper.txt \
 			doc/call-volume-api.txt doc/cell-broadcast-api.txt \
 			doc/message-api.txt doc/message-waiting-api.txt \
 			doc/phonebook-api.txt doc/radio-settings-api.txt \
-			doc/sim-api.txt doc/stk-api.txt
+			doc/sim-api.txt doc/stk-api.txt \
+			doc/audio-settings-api.txt
 
 
 test_scripts = test/backtrace \
diff --git a/doc/audio-settings-api.txt b/doc/audio-settings-api.txt
new file mode 100644
index 00000000..f59a230d
--- /dev/null
+++ b/doc/audio-settings-api.txt
@@ -0,0 +1,26 @@
+Audio settings hierarchy
+========================
+
+Service		org.ofono
+Interface	org.ofono.AudioSettings
+Object path	[variable prefix]/{modem0,modem1,...}
+
+Methods		dict GetProperties()
+
+			Returns all audio settings properties. See the
+			properties section for available properties.
+
+			Possible Errors: [service].Error.InvalidArguments
+
+Signals		PropertyChanged(string property, variant value)
+
+			This signal indicates a changed value of the given
+			property.
+
+Properties	boolean Active [readonly]
+
+			Indicates if an audio PCM stream is active or not.
+
+			This is not supported by all modems. Only modems
+			where the audio data can be routed to the host
+			application processor will support this.