Correcting typos

advanced/transcode/extract_audio_from_file.rst

@@ -2,13 +2,13 @@
  How to extract audio from a file
 #####################################
 
-This page describes how audio can be extracted from an audio+video file and re-encoded to be saved in another audio format.
+This page describes how audio can be extracted from a file and re-encoded to be saved in another audio format.
 
 *******************************
 Using the Wizard (GUI Method)  
 *******************************
 
-Audio extraction and re-encoding to the desirable format can be done by:
+Audio extraction and conversion to the desirable format can be done by:
 
 1. Click on the :menuselection:`Media` tab and go to :guilabel:`Convert/Save` (keyboard shortcut is `Ctrl+R`).
 
@@ -55,7 +55,7 @@ AAC	           mp4a      ts
 PCM 		   s16l      wav
 =============  ========  =====
 
-In order to extract audio and save the file, follow these steps:
+In order to extract audio (and convert, if required), follow these steps:
 
 1. Open Command line.