diff --git a/source/_integrations/marytts.markdown b/source/_integrations/marytts.markdown
index 37ff38238ad..083167a1bfa 100644
--- a/source/_integrations/marytts.markdown
+++ b/source/_integrations/marytts.markdown
@@ -31,24 +31,34 @@ port:
   type: integer
   default: 59125
 codec:
-  description: "The audio codec. Supported codecs are `aiff`, `au` and `wav`."
+  description: "The audio codec. Supported codecs are `AIFF_FILE`, `AU_FILE` and `WAVE_FILE`."
   required: false
   type: string
-  default: "`wav`"
+  default: "`WAVE_FILE`"
 voice:
   description: The speaker voice.
   required: false
   type: string
   default: "`cmu-slt-hsmm`"
 language:
-  description: "The language to use. Supported languages are `de`, `en-GB`, `en-US`, `fr`, `it`, `lb`, `ru`, `sv`, `te` and `tr`."
+  description: "The language to use. Supported languages are `de`, `en_GB`, `en_US`, `fr`, `it`, `lb`, `ru`, `sv`, `te` and `tr`."
   required: false
   type: string
-  default: "`en-US`"
+  default: "`en_US`"
+effect:
+  description: "A dictionary of effects which should be applied to the speach output."
+  required: false
+  type: map
 {% endconfiguration %}
 
 See [documentation](http://mary.dfki.de/documentation/index.html) for details.
 
+## Speach effects
+
+For more information about the different effects take a look at the demo page of your MaryTTS installation (http://localhost:59125/).
+
+There you can read about each effect and also test them on the fly.
+
 ## Full configuration example
 
 A full configuration sample including optional variables:
@@ -59,7 +69,19 @@ tts:
   - platform: marytts
     host: 'localhost'
     port: 59125
-    codec: 'wav'
+    codec: 'WAVE_FILE'
     voice: 'cmu-slt-hsmm'
-    language: 'en-US'
+    language: 'en_US'
+    effect:
+      Volume: "amount:2.0;",
+      TractScaler: "amount:1.5;",
+      F0Scale: "f0Scale:2.0;",
+      F0Add: "f0Add:50.0;",
+      Rate: "durScale:1.5;",
+      Robot: "amount:100.0;",
+      Whisper: "amount:100.0;",
+      Stadium: "amount:100.0",
+      Chorus: "delay1:466;amp1:0.54;delay2:600;amp2:-0.10;delay3:250;amp3:0.30",
+      FIRFilter: "type:3;fc1:500.0;fc2:2000.0",
+      JetPilot: ""
 ```