Minim |
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ofMidiNote |
Description Construct a Frequency from a MIDI note value.Signature Frequency ofMidiNote(float midiNote) Parameters midiNote — float: a value in the range [0,127]Returns a new Frequency object 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 |