PlayThatTune4 - Working with Files and Audio

Develop a Java program that uses the StdAudioOut to play music from text files with note and duration information modified with harmonics. There are two file representations of the note and duration data. One has int / double pairs representing pitch and duration respectively with 0 being the pitch of concert A (440 hz.) The other file representation has Alpha in the file name and uses a String / double pair representing pitch and duration respectively with A being the pitch of concert A. This contrived alpha convention for reprsenting change in octave uses preceeding - or + signs. One sign for each octave, - for lower frequencies and + for higher frequencies -see the table below. Work to be submitted in Blackboard.

Requirements for the program

must use Scanner and File  in place of StdIn and redirection Useful methods:
   Scanner in = new Scanner(file), opens a scanner with the specified or chosen file as the input
   in.hasNext(), true when there is another token available to read
   in.next(), returns the next String token
   in.nextInt(), returns the next int
   in.nextDouble(), return the next double
   file.getName().contains("Alpha"), allows distinguishing between the numeric and alphanumeric files which have to be processed differently
must use superposition to weight harmonics .5 for base tone, .25 for half tone and .25 for double tone, with methods tone, note and sum as outlined in Program 3
must use StdAudioOut.java to play the music
must be able to use a JFileChooser to select the file Useful methods:
   new JFileChooser("."), invokes a constructor making this the current directory
   showOpenDialog(null), null is used so the dialog box opens in the center of the screen instead of on top of another GUI
   getSelectedFile(), returns the file chosen by the user
must be able to play any of the numeric files in the music.zip folder with harmonics added (download and unzip, place the music folder in your project folder) by reading the file name returned from the file chooser to determine that it does not contain "Alpha" in its name (30 pts.)
must be able to read and play any of the alphanumeric files with "Alpha" in the file name with harmonics added (50 pts.)
must include extensive documentation -remark blocks and in line comments -see StdAudioOut.java for examples (10 pts.)
must be readable making use of methods where practical to improve readability (10 pts.)

Program Design

Your program consists of two classes:

The PlayThatTune class

This class must contain methods with the following signatures:

public static double[] tone(double hz, double t) When invoked, this method returns a discretized sine wave of a given frequency and duration in a data array
public static double[] note(int p, double t) When invoked, this method combines the original tone with double and half tones, weighting the original at .5 and the double and half tones at .25 each
public static double[] sum(double[] a, double[] b, double awt, double bwt) When invoked, this method returns a single array which is the weighted (weights add to 1) sum of the two input parameter arrays
public static void main(String[] args) throws FileNotFoundException When invoked, this method reads in a file, converting the pitch/duration String pairs which must be converted to either int/double or String/double format, based on the file name, then converted to notes that are played by StdAudioOut
Other methods as desired to make your code more readable/useable.

The StdAudioOut class

This class is a reduced version of StdAudio. In its reduced format, this class only plays music when the play method is invoked.

A table of calculated frequencies based on concert A = 0

	frequency = 440*Math.pow(2, i / 12)
i	note		frequency
-48	----A		27.50
-47	----A#	Bb	29.14
-46	----B		30.87
-45	----C		32.70
-44	----C#	Db	34.65
-43	----D		36.71
-42	----D#	Eb	38.89
-41	----E		41.20
-40	----F		43.65
-39	----F#	Gb	46.25
-38	----G		49.00
-37	----G#	Ab	51.91
-36	---A		55.00
-35	---A#	Bb	58.27
-34	---B		61.74
-33	---C		65.41
-32	---C#	Db	69.30
-31	---D		73.42
-30	---D#	Eb	77.78
-29	---E		82.41
-28	---F		87.31
-27	---F#	Gb	92.50
-26	---G		98.00
-25	---G#	Ab	103.83
-24	--A		110.00
-23	--A#	Bb	116.54
-22	--B		123.47
-21	--C		130.81
-20	--C#	Db	138.59
-19	--D		146.83
-18	--D#	Eb	155.56
-17	--E		164.81
-16	--F		174.61
-15	--F#	Gb	185.00
-14	--G		196.00
-13	--G#	Ab	207.65
-12	-A		220.00
-11	-A#	Bb	233.08
-10	-B		246.94
-9	-C		261.63
-8	-C#	Db	277.18
-7	-D		293.66
-6	-D#	Eb	311.13
-5	-E		329.63
-4	-F		349.23
-3	-F#	Gb	369.99
-2	-G		392.00
-1	-G#	Ab	415.30
0	A		440.00
1	A#	Bb	466.16
2	B		493.88
3	C		523.25
4	C#	Db	554.37
5	D		587.33
6	D#	Eb	622.25
7	E		659.26
8	F		698.46
9	F#	Gb	739.99
10	G		783.99
11	G#	Ab	830.61
12	+A		880.00
13	+A#	Bb	932.33
14	+B		987.77
15	+C		1046.50
16	+C#	Db	1108.73
17	+D		1174.66
18	+D#	Eb	1244.51
19	+E		1318.51
20	+F		1396.91
21	+F#	Gb	1479.98
22	+G		1567.98
23	+G#	Ab	1661.22
24	++A		1760.00
25	++A#	Bb	1864.66
26	++B		1975.53
27	++C		2093.00
28	++C#	Db	2217.46
29	++D		2349.32
30	++D#	Eb	2489.02
31	++E		2637.02
32	++F		2793.83
33	++F#	Gb	2959.96
34	++G		3135.96
35	++G#	Ab	3322.44
36	+++A		3520.00
37	+++A#	Bb	3729.31
38	+++B		3951.07
39	+++C		4186.01
40	+++C#	Db	4434.92
41	+++D		4698.64
42	+++D#	Eb	4978.03
43	+++E		5274.04
44	+++F		5587.65
45	+++F#	Gb	5919.91
46	+++G		6271.93
47	+++G#	Ab	6644.88
48	++++A		7040.00
49	++++A#	Bb	7458.62
50	++++B		7902.13
51	++++C		8372.02
52	++++C#	Db	8869.84
53	++++D		9397.27
54	++++D#	Eb	9956.06
55	++++E		10548.08
56	++++F		11175.30
57	++++F#	Gb	11839.82
58	++++G		12543.85
59	++++G#	Ab	13289.75
60	+++++A		14080.00
61	+++++A#	Bb	14917.24
62	+++++B		15804.27
63	+++++C		16744.04
64	+++++C#	Db	17739.69
65	+++++D		18794.55
66	+++++D#	Eb	19912.13
67	+++++E		21096.16
68	+++++F		22350.61
69	+++++F#	Gb	23679.64
70	+++++G		25087.71
71	+++++G#	Ab	26579.50
72	++++++A		28160.00