|
Minim |
|
|
getTempo |
Description Return the current tempo of the AudioOuput. Tempo is expressed in BPM (beats per minute).Signature float getTempo() Returns float: the current tempo Related setTempo ( )Example /**
* This sketch demonstrates how to create synthesized sound with Minim using an <code>AudioOutput</code> and the
* default instrument built into an <code>AudioOutput</code>. By using the <code>playNote</code> method you can
* schedule notes to played at some point in the future, essentially allowing to you create musical scores with
* code. Because they are constructed with code, they can be either deterministic or different every time. This
* sketch creates a deterministic score, meaning it is the same every time you run the sketch. It also demonstrates
* a couple different versions of the <code>playNote</code> method.
* <p>
* For more complex examples of using <code>playNote</code> check out
* algorithmicCompExample and compositionExample in the Synthesis folder.
* <p>
* For more information about Minim and additional features,
* visit http://code.compartmental.net/minim/
*/
import ddf.minim.*;
import ddf.minim.ugens.*;
Minim minim;
AudioOutput out;
void setup()
{
size(512, 200, P3D);
minim = new Minim(this);
// use the getLineOut method of the Minim object to get an AudioOutput object
out = minim.getLineOut();
// set the tempo of the sequencer
// this makes the first argument of playNote
// specify the start time in quarter notes
// and the duration becomes relative to the length of a quarter note
// by default the tempo is 60 BPM (beats per minute).
// at 60 BPM both start time and duration can be interpreted as seconds.
// to retrieve the current tempo, use getTempo().
out.setTempo( 80 );
// pause the sequencer so our note play back will be rock solid
// if you don't do this, then tiny bits of error can occur since
// the sequencer is running in parallel with you note queueing.
out.pauseNotes();
// given start time, duration, and frequency
out.playNote( 0.0, 0.9, 97.99 );
out.playNote( 1.0, 0.9, 123.47 );
// given start time, duration, and note name
out.playNote( 2.0, 2.9, "C3" );
out.playNote( 3.0, 1.9, "E3" );
out.playNote( 4.0, 0.9, "G3" );
// given start time and note name or frequency
// (duration defaults to 1.0)
out.playNote( 5.0, "" );
out.playNote( 6.0, 329.63);
out.playNote( 7.0, "G4" );
// the note offset is simply added into the start time of
// every subsequenct call to playNote. It's expressed in beats.
// to get the current note offset, use getNoteOffset().
out.setNoteOffset( 8.1 );
// because only given a note name or frequency
// starttime defaults to 0.0 and duration defaults to 1.0
out.playNote( "G5" );
out.playNote( 987.77 );
// now we can start the sequencer again to hear our sequence
out.resumeNotes();
}
void draw()
{
background(0);
stroke(255);
// draw the waveforms
for(int i = 0; i < out.bufferSize() - 1; i++)
{
line( i, 50 + out.left.get(i)*50, i+1, 50 + out.left.get(i+1)*50 );
line( i, 150 + out.right.get(i)*50, i+1, 150 + out.right.get(i+1)*50 );
}
}
Usage Web & Application |