This example will show how you can specify any frequency for jMusic notes.
When Notes are constructed they can take anint or adoublevalue.
When taking an intvalue it is assumed that MIDI note numbers (i.e., 60 = C4) are desired.
When taking a doublevalue for pitch, it is assumed the value is a frequency in hertz (i.e., 440.0 = A4).
Because the pitch is adoublevalue (64 bit fractional) the pitch accuracy available in jMusic is ridiculously fine (e.g., 1026.08940567 Hz).
All you micro-tonal composers go wild at this point! When specifying the frequency value, division can be used as a convenient way of
accurately calculating harmonic intervals from a fundamental. For example, Note n = new Note(440.0 * 3 / 2, CROTCHET);  will produce a
tone that is a perfect fifth above the fundamental.  

Click here to view source.

import jm.JMC;
import jm.music.data.*;
import jm.util.View;
import jm.util.Write;
import jm.audio.Instrument;
          

As well as the jm.music class="c3">classes, the jm.audio.Instrument class="c3">class is imported. The jm.util.Write class has the method for outputting an audio file to disk.

public final class SineTest implements JMC{
	public static void main(String[] args){
             Score s = new Score();
             s.setTempo(60);
             Part p = new Part("Sine", 0);

           for(int i=0; i<20;i++) {
             Note n = new Note(Math.random() * 500 + 1000 , 4.0);
                n.setPan(Math.random());
               Phrase phrase2  = new Phrase(n, Math.random() * 10);
 
                p.addPhrase(phrase2);
	     }

             s.addPart(p);
            

          Instrument inst = new SineInst(22000);
          Write.au(s,"SineTest.au", inst);

          View.print(s);
      }
}

This example uses theineInst instrument that produces a simple sine wave tone. There are a number of instruments (including this one) that ship
with jMusic. You can create your own of any complexity you wish . The argument, 22000, specifies the sample rate.
This will determine the quality and highest frequency of the instrument - for sine waves the nyquist frequency is more of a consideration than quality
when choosing this value. Also, the higher the sample rate, the longer it will take to render, and the larger the resulting file.

The Write.au() method renders the score to a file on disk with the provided name, using the provided instrument(s);