fix typos

documentation/application_workflow.md

@@ -13,16 +13,16 @@ The drawing area is represented in the following figure, with the 2 parameters d
 
 ![Drawing area](rsc/drawing_area.jpeg)
 
-The different tools available and the sound parameters they controlled are represented in the following figure.
+The different tools available and the sound parameters they control are represented in the following figure.
 
 ![Different types of pens](rsc/pens.png)
 
 
-In the following sections we will describe in details all the parameters that can be controlled by the users using the drawing application, and how they can do so. In particular, we will talk about:
+In the following sections we will describe in detail all the parameters that can be controlled by the users using the drawing application. In particular, we will talk about:
 
-- Sound synthesis: how to control the sound timbre using colors?
-- Envelopes: how to control one or many envelopes using different pens?
-- Effects: how to apply and control the effects by drawing?
+- Sound synthesis: how to control the sound timbre using colors;
+- Envelopes: how to control one or many envelopes using different pens;
+- Effects: how to apply and control the effects by drawing