Increase maxDuration

THEMES.md

 
 * `name` - What name to show in the dropdown menu in the editor (the default is the key)
 * `foregroundColor` - A convenience option for setting `waveColor` and `captionColor` to the same thing.
-* `maxDuration` - Maximum duration of an audiogram, in seconds (e.g. set this to `30` to enforce the 30-second limit for Twitter)
+* `maxDuration` - Maximum duration of an audiogram, in seconds (e.g. set this to `30` to enforce a 30-second time limit). The default is `300` (5 minutes).
 
 ### Making changes
 

settings/themes.json

     "width": 1280,
     "height": 720,
     "framesPerSecond": 20,
-    "maxDuration": 30,
+    "maxDuration": 300,
     "samplesPerFrame": 128,
     "pattern": "wave",
     "waveTop": 150,