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Minim |
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asMidiNote |
Description Get the MIDI note value of this FrequencySignature float asMidiNote() Returns float: the MIDI note representation of this Frequency Related FrequencyExample /* frequencyExample<br/>
is an example of using the Frequency class to easily turn keyboard input
into the frequency of an Oscil. Simply type on the home row to change
the pitch of the tone.
<p>
For more information about Minim and additional features,
visit http://code.compartmental.net/minim/
*/
// import everything necessary to make sound.
import ddf.minim.*;
import ddf.minim.ugens.*;
// create all of the variables that will need to be accessed in
// more than one methods (setup(), draw(), stop()).
Minim minim;
AudioOutput out;
Oscil wave;
// keep track of the current Frequency so we can display it
Frequency currentFreq;
// setup is run once at the beginning
void setup()
{
// initialize the drawing window
size(512, 200);
// initialize the minim and out objects
minim = new Minim(this);
out = minim.getLineOut();
currentFreq = Frequency.ofPitch( "A4" );
wave = new Oscil( currentFreq, 0.6f, Waves.TRIANGLE );
wave.patch( out );
}
// draw is run many times
void draw()
{
// erase the window to brown
background( 64, 32, 0 );
// draw using a beige stroke
stroke( 255, 238, 192 );
text( "Current Frequency in Hertz: " + currentFreq.asHz(), 5, 15 );
text( "Current Frequency as MIDI note: " + currentFreq.asMidiNote(), 5, 30 );
// draw the waveforms
for( int i = 0; i < out.bufferSize() - 1; i++ )
{
// find the x position of each buffer value
float x1 = map( i, 0, out.bufferSize(), 0, width );
float x2 = map( i+1, 0, out.bufferSize(), 0, width );
// draw a line from one buffer position to the next for both channels
line( x1, 50 + out.left.get(i)*50, x2, 50 + out.left.get(i+1)*50);
line( x1, 150 + out.right.get(i)*50, x2, 150 + out.right.get(i+1)*50);
}
}
// change the midi note when pressing keys on the keyboard
// we set midiNoteIn directly with the setMidiNoteIn method
// but you could also use a Line to lerp to the next note
// by patching it to midiNoteIn.
void keyPressed()
{
if ( key == 'a' ) currentFreq = Frequency.ofPitch( "A4" );
if ( key == 's' ) currentFreq = Frequency.ofPitch( "B4" );
if ( key == 'd' ) currentFreq = Frequency.ofPitch( "C#5" );
if ( key == 'f' ) currentFreq = Frequency.ofPitch( "D5" );
if ( key == 'g' ) currentFreq = Frequency.ofPitch( "E5" );
if ( key == 'h' ) currentFreq = Frequency.ofPitch( "F#5" );
if ( key == 'j' ) currentFreq = Frequency.ofPitch( "G#5" );
if ( key == 'k' ) currentFreq = Frequency.ofPitch( "A5" );
if ( key == 'l' ) currentFreq = Frequency.ofPitch( "B5" );
if ( key == ';' ) currentFreq = Frequency.ofPitch( "C#6" );
if ( key == '\'') currentFreq = Frequency.ofPitch( "E6" );
// note that there are two other static methods for constructing Frequency objects
// currentFreq = Frequency.ofHertz( 440 );
// currentFreq = Frequency.ofMidiNote( 69 );
wave.setFrequency( currentFreq );
}
Usage Web & Application |