Update status

Author: pschatzmann

README.md

@@ -39,7 +39,7 @@ git clone pschatzmann/arduino-sound-tools.git
 
 ## Documentation
 
-Here is the generated [Class documentation](https://pschatzmann.github.io/arduino-sound-tools/html/annotated.html)
+Here is the generated [Class documentation](https://pschatzmann.github.io/arduino-sound-tools/html/annotated.html). You might find further information in ][one of my blogs](https://www.pschatzmann.ch/home/category/machine-sound/)
 
 ## Project Status
 
@@ -49,7 +49,7 @@ This is currently work in progress:
 |------------------------|---------|
 | Analog input - ADC     | tested  |
 | I2S                    | tested  |
-| Files                  | open    |
+| Files                  | tested    |
 | Streams                | open    |
 | WAV encoding/deconding | open    |          
 | AAC encoding/deconding | open    |