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Data update

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This commit is contained in:
Ingy döt Net 2025-06-11 20:16:52 -04:00
parent 72eb4943cb
commit 4d5544505c
2347 changed files with 62432 additions and 16731 deletions
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58
Task/Musical-scale/Java/musical-scale.java
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@ -1,4 +1,6 @@
import java.util.List;
import java.util.stream.IntStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.LineUnavailableException;
@ -7,48 +9,54 @@ import javax.sound.sampled.SourceDataLine;
public final class MusicalScale {
public static void main(String[] aArgs) {
List<Double> frequencies = List.of( 261.63, 293.66, 329.63, 349.23, 392.00, 440.00, 493.88, 523.25 );
final int duration = 500;
List<Double> frequencies = List.of( 261.63, 293.66, 329.63, 349.23, 392.00, 440.00, 493.88, 523.25 );
prepareSourceDataLine();
final int duration = 500; // in milliseconds
final int volume = 1;
for ( int i = 0; i < 3; i++ ) {
IntStream.range(0, 3).forEach( _ -> {
for ( double frequency : frequencies ) {
musicalTone(frequency, duration, volume);
}
}
} );
sourceDataLine.close();
}
private static void musicalTone(double aFrequency, int aDuration, int aVolume) {
byte[] buffer = new byte[1];
AudioFormat audioFormat = getAudioFormat();
private static void musicalTone(double frequency, int duration, int volume) {
sourceDataLine.start();
try ( SourceDataLine sourceDataLine = AudioSystem.getSourceDataLine(audioFormat) ) {
sourceDataLine.open(audioFormat);
sourceDataLine.start();
for ( int i = 0; i < aDuration * 8; i++ ) {
double angle = i / ( SAMPLE_RATE / aFrequency ) * 2 * Math.PI;
buffer[0] = (byte) ( Math.sin(angle) * 127 * aVolume );
sourceDataLine.write(buffer, BYTE_OFFSET, buffer.length);
}
sourceDataLine.drain();
sourceDataLine.stop();
sourceDataLine.close();
} catch (LineUnavailableException exception) {
exception.printStackTrace();
}
IntStream.range(0, 8 * duration).forEach( i -> {
final double angle = i / ( SAMPLE_RATE / frequency ) * 2 * Math.PI;
byte[] buffer = new byte[] { (byte) ( Math.sin(angle) * 127 * volume ) };
sourceDataLine.write(buffer, BYTE_OFFSET, buffer.length);
} );
sourceDataLine.drain();
sourceDataLine.stop();
}
private static AudioFormat getAudioFormat() {
private static void prepareSourceDataLine() {
final int sampleSizeInBits = 8;
final int numberChannels = 1;
final boolean signedData = true;
final boolean isBigEndian = false;
return new AudioFormat(SAMPLE_RATE, sampleSizeInBits, numberChannels, signedData, isBigEndian);
AudioFormat audioFormat = new AudioFormat(
SAMPLE_RATE, sampleSizeInBits, numberChannels, signedData, isBigEndian);
try {
sourceDataLine = AudioSystem.getSourceDataLine(audioFormat);
sourceDataLine.open(audioFormat);
} catch (LineUnavailableException lue) {
lue.printStackTrace();
}
}
private static SourceDataLine sourceDataLine;
private static float SAMPLE_RATE = 8_000.0F;
private static final int BYTE_OFFSET = 0;