=========================  SET UP: prepare for media files

> FileChooser.setMediaPath( "/Users/wallingf/home/teaching/cs1-media/intro-prog-java/mediaSources/" )


=========================  QUICK EXERCISE: find max sample difference

> Sound voice = new Sound( FileChooser.getMediaPath("ew/the-voice-raw.aiff") );
> voice.maximumDifferenceV1()
15202
                              -----   But we'll need the *location*, so...

> voice = new Sound( FileChooser.getMediaPath("ew/the-voice-raw.aiff") );
> voice. maximumDifference()
70805
> voice.getSampleValueAt( 70805 )
13165
> voice.getSampleValueAt( 70806 )
-2037
> voice.explore();
> Math.abs( voice.getSampleValueAt(70805) - voice.getSampleValueAt(70806) )
15202

> Sound sweetDreams = new Sound( FileChooser.getMediaPath("ew/SweetDreams.aiff") );
> sweetDreams. maximumDifference()
8088407
> sweetDreams.getSampleValueAt( 8088407 )
-19225
> sweetDreams.getSampleValueAt( 8088408 )
-2241
> Math.abs( sweetDreams.getSampleValueAt(8088407) - sweetDreams.getSampleValueAt(8088408) )
16984


=========================  IDEA: changing a sound's frequency

> voice = new Sound( FileChooser.getMediaPath("ew/the-voice-clipped-and-pitched.aiff") );
> voice.changeFrequency( 22050.0 / 16000.0 );               //  OOPS!  wrong way
> voice.play();

> voice = new Sound( FileChooser.getMediaPath("ew/the-voice-clipped-and-pitched.aiff") );
> voice.changeFrequency( 16000.0 / 22050.0 );
> voice.play();

                              -----   The frequency seems right now!
                              -----   ... but the result sound is too short.
                              -----   What can we do?


=========================  IDEA: data compression

// show compression and decompression of And So It Goes
// the file gets larger!
// is the wave the same?


=========================  EXERCISE: data compression

> Sound voice = new Sound( FileChooser.getMediaPath("ew/the-voice-raw.aiff") );
> voice.displayDifferences( voice.arrayOfDifferencesV1(), 1000, 1050 );
43
84
102
90
61
24
...
                                   -----   But this uses ints -- same space!
                                   -----   Try a ** byte ** instead.

> voice.displayDifferences( voice.arrayOfDifferences(), 1000, 1050 );
43
84
102
90
61
24
...
                                   -----   This encoding requires us to
                                   -----   manipulate byte arrays.  But
                                   -----   this is really a new
                                   -----   *kind of object*

=========================  IDEA: make a DiffSound class for compressed sound

> Sound voice = new Sound( FileChooser.getMediaPath("ew/the-voice-raw.aiff") );
> DiffSound compressedVoice = voice.compress();
> compressedVoice.displayDifferences( 1000, 1050 );
43
84
102
90
61
24
...