sound docs

docs/_sidebar.md

@@ -12,4 +12,5 @@
   - [Custom Pages & Notifications](custom.md)
   - [Alarm clock](alarm.md)
   - [Timer](timer.md)
-  - [Icons](icons.md)
+  - [Icons](icons.md)
+  - [Sounds](sounds.md)

docs/sounds.md

@@ -0,0 +1,16 @@
+# Sounds
+
+
+Optionally, you can play a sound via the integrated buzzer.  
+To do this, go to the file manager in the web interface and create a new text file in the "MELODIES" folder.
+Name it whatever you like, e.g. "alarm.txt". Inside the file, place a melody in RTTTL format.
+You can find many melodies on the internet. 
+ 
+For example, here:  
+https://www.laub-home.de/wiki/RTTTL_Songs
+
+*Online RTTTL player:*  
+https://adamonsoon.github.io/rtttl-play/
+
+*RTTTL editor:*  
+https://corax89.github.io/esp8266Game/soundEditor.html