Add how EI handle changes in input data.

Author: martacarbone

docs/models/images/ei_error.png

@@ -88,7 +88,9 @@ Here we added the model variable to be used for each brick.
 # This section will address Edge Impulse specific case
 An Edge Impulse project is a set of input data and one or more impulses.
 
-*NOTE:* It is unclear whether the project category can be defined at the project or impulse level.
+For each project there is the project type (audio/video...) that should be set accordingly to input data.
+Changing input data type is recognized, for an audio project and an image upload, the user will be prompted with a message:
+![Change project type](images/ei_error.png)
 
 An impulse is a set of configurations defined on input data that can generate a model according to a classification method, a processing block, and hardware parameters.