Hi everyone!

I'm trying to build an Arduino Theremin following these intructions: Tutorial but, when I import the code into Processing, I got that error:

=== Minim Error ===
=== Likely buffer underrun in AudioOutput.

That's the code:

1. // written at: luckylarry.co.uk
2. // very easy Theremin combined with processing
3. // sketch prints out distance to the serial port
4. // processing picks up value and plays notes accordingly
5. // no annoying speaker drone! :)  replace the sounds and delays with
6. // your own...
7. import processing.serial.*;                // import serial library so we can read the serial port
8. import ddf.minim.*;                        // import minim library
9. // define the serial port
10. Serial myPort;
11. // define minim variables:
12. // here we say that variable A is an audiosample etc...
13. Minim minim;
14. AudioSample GSharp;
15. AudioSample A;
16. AudioSample Bb;
17. AudioSample B;
18. AudioSample C;
19. AudioSample CSharp;
20. AudioSample D;
21. AudioSample Eb;
22. AudioSample E;
23. AudioSample F;
24. AudioSample FSharp;
25. AudioSample G;
26. // setup
27. void setup () {
28.   // set up the variables, loading in the sound files from your project folder
29.   // which should be the same place as where you save this sketch
30.   // details on using minim and audioSample are here: http://code.compartmental.net/tools/minim/manual-audiosample/
31.   minim = new Minim(this);
32.   GSharp = minim.loadSample("GSharp.wav", 2048);
33.   A = minim.loadSample("A.wav", 2048);
34.   Bb = minim.loadSample("Bb.wav", 2048);
35.   B = minim.loadSample("B.wav", 2048);
36.   C = minim.loadSample("C.wav", 2048);
37.   CSharp = minim.loadSample("CSharp.wav", 2048);
38.   D = minim.loadSample("D.wav", 2048);
39.   Eb = minim.loadSample("Eb.wav", 2048);
40.   E = minim.loadSample("E.wav", 2048);
41.   F = minim.loadSample("F.wav", 2048);
42.   FSharp = minim.loadSample("FSharp.wav", 2048);
43.   G = minim.loadSample("G.wav", 2048);
44.   // List serial ports, saves us trying to figure out which COM we're using.
45.   println(Serial.list());
46.   // Open the active port - providing you've only got one sending serial data (which you should)
47.   myPort = new Serial(this, Serial.list()[0], 9600);
48.   // don’t read the serial buffer until we see a new line - this is genius and simple compared with my last efforts
49.   myPort.bufferUntil('n');
50. }
51. void draw() {
52.   // we need to declare the draw function even though we're not using it!!
53. }
54. void serialEvent (Serial myPort) {
55.   // get the string from the serial buffer - gets all chars until the next line break...
56.   String bufferString = myPort.readStringUntil('n');
57.   if (bufferString != null) {
58.     // get rid of any whitespace - sometimes the serial buffer can have blanks etc.. in the string
59.     bufferString = trim(bufferString);
60.     // convert the value to an int - we're only sending numbers over the serial port so parsing it to an int shouldn't ever be an issue.
61.     float inByte = float(bufferString);
62.     int pulse = int(bufferString);         // declare a variable to hold our value.
63.     println(pulse);                        // for debug print the value so we can check it.
64.     // remember that our pulse is in CM so if its less than 5cm then do this etc... else do this... else do this.. for as many sound samples
65.     if ( pulse < 5 ) {
66.       GSharp.trigger();
67.       delay(25);
68.     }
69.     else if ( pulse < 8 ) {
70.       A.trigger();
71.       delay(25);
72.     }
73.     else if ( pulse < 11 ) {
74.       Bb.trigger();
75.       delay(25);
76.     }
77.     else if ( pulse < 14 ) {
78.       B.trigger();
79.       delay(25);
80.     }
81.     else if ( pulse < 17 ) {
82.       C.trigger();
83.       delay(25);
84.     }
85.     else if ( pulse < 20 ) {
86.       CSharp.trigger();
87.       delay(25);
88.     }
89.     else if ( pulse < 23 )  {
90.       D.trigger();
91.       delay(25);
92.     }
93.     else if ( pulse < 26 ) {
94.       Eb.trigger();
95.       delay(25);
96.     }
97.     else if ( pulse < 29 ) {
98.       E.trigger();
99.       delay(25);
100.     }
101.     else if ( pulse < 32 ) {
102.       F.trigger();
103.       delay(25);
104.     }
105.     else if ( pulse < 35 ) {
106.       FSharp.trigger();
107.       delay(25);
108.     }
109.     else if ( pulse < 38 ) {
110.       G.trigger();
111.       delay(25);
112.     }
113.     else if ( pulse > 50 ) {
114.       // if the distance is greater than 50cm then play nothing
115.     }
116.   } // end if there's a value in the serial bufferstring
117. }   // end void serialevent()

I've downloaded the music files, I've changed the name and I've put them into sketch folder, then I've change the COM port by [0] (above, in red).
After that, I'm getting the same error.

What can I do?

 I was thinking about using another minim fuction (such as AudioPlayer), but I have no idea how to do that (my programing knowledge is too limited).

All your replies will be helpful for me!!


Thanks you!