Java原始音频输出

只是想知道Java中是否存在像Python中的模块PyAudiere这样的库，它只是允许您创建音调并播放它们，就像这个示例Python代码：

device = audiere.open_device() tone = device.create_tone(500) #create a 500hz tone tone.play() tone.stop() 

这只是为您的默认声音设备分配一个变量，然后为该设备制作一个音调并播放它然后停止它。 这样的库是否易于使用？

我感谢任何反馈，谢谢！ 😀

Answer 1

在内存中生成声音非常简单。

例如

生成音调（并将其存储在Clip ）的重要部分包含在此代码中：

 /** Generates a tone, and assigns it to the Clip. */ public void generateTone() throws LineUnavailableException { if ( clip!=null ) { clip.stop(); clip.close(); } else { clip = AudioSystem.getClip(); } boolean addHarmonic = harmonic.isSelected(); int intSR = ((Integer)sampleRate.getSelectedItem()).intValue(); int intFPW = framesPerWavelength.getValue(); float sampleRate = (float)intSR; // oddly, the sound does not loop well for less than // around 5 or so, wavelengths int wavelengths = 20; byte[] buf = new byte[2*intFPW*wavelengths]; AudioFormat af = new AudioFormat( sampleRate, 8, // sample size in bits 2, // channels true, // signed false // bigendian ); int maxVol = 127; for(int i=0; i 

Beeper.java

这是自包含的代码，显示上面显示的G​​UI。 它是一种混合体，既可以作为自由浮动框架，也可以作为applet嵌入。

 import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.border.*; import java.text.DecimalFormat; import javax.sound.sampled.*; import java.io.ByteArrayInputStream; /** Beeper presents a small, loopable tone that can be heard by clicking on the Code Key. It uses a Clip to loop the sound, as well as for access to the Clip's gain control. @author Andrew Thompson @version 2009-12-19 @license LGPL */ public class Beeper extends JApplet { BeeperPanel bp; public void init() { bp = new BeeperPanel(); getContentPane().add(bp); validate(); String sampleRate = getParameter("samplerate"); if (sampleRate!=null) { try { int sR = Integer.parseInt(sampleRate); bp.setSampleRate(sR); } catch(NumberFormatException useDefault) { } } String fpw = getParameter("fpw"); if (fpw!=null) { try { int fPW = Integer.parseInt(fpw); JSlider slider = bp.getFramesPerWavelengthSlider(); slider.setValue( fPW ); } catch(NumberFormatException useDefault) { } } boolean harmonic = (getParameter("addharmonic")!=null); bp.setAddHarmonic(harmonic); bp.setUpSound(); if ( getParameter("autoloop")!=null ) { String loopcount = getParameter("loopcount"); if (loopcount!=null) { try { Integer lC = Integer.parseInt(loopcount); bp.loop( lC.intValue() ); } catch(NumberFormatException doNotLoop) { } } } } public void stop() { bp.loopSound(false); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { JFrame f = new JFrame("Beeper"); f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); BeeperPanel BeeperPanel = new BeeperPanel(); f.setContentPane(BeeperPanel); f.pack(); f.setMinimumSize( f.getSize() ); f.setLocationByPlatform(true); f.setVisible(true); } }); } } /** The main UI of Beeper. */ class BeeperPanel extends JPanel { JComboBox sampleRate; JSlider framesPerWavelength; JLabel frequency; JCheckBox harmonic; Clip clip; DecimalFormat decimalFormat = new DecimalFormat("###00.00"); BeeperPanel() { super(new BorderLayout()); // Use current OS look and feel. try { UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(this); } catch (Exception e) { e.printStackTrace(); } setPreferredSize( new Dimension(300,300) ); JPanel options = new JPanel(); BoxLayout bl = new BoxLayout(options,BoxLayout.Y_AXIS); options.setLayout(bl); Integer[] rates = { new Integer(8000), new Integer(11025), new Integer(16000), new Integer(22050) }; sampleRate = new JComboBox(rates); sampleRate.setToolTipText("Samples per second"); sampleRate.setSelectedIndex(1); JPanel pSampleRate = new JPanel(new BorderLayout()); pSampleRate.setBorder(new TitledBorder("Sample Rate")); pSampleRate.add( sampleRate ); sampleRate.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { setUpSound(); } }); options.add( pSampleRate ); framesPerWavelength = new JSlider(JSlider.HORIZONTAL,10,200,25); framesPerWavelength.setPaintTicks(true); framesPerWavelength.setMajorTickSpacing(10); framesPerWavelength.setMinorTickSpacing(5); framesPerWavelength.setToolTipText("Frames per Wavelength"); framesPerWavelength.addChangeListener( new ChangeListener(){ public void stateChanged(ChangeEvent ce) { setUpSound(); } } ); JPanel pFPW = new JPanel( new BorderLayout() ); pFPW.setBorder(new TitledBorder("Frames per Wavelength")); pFPW.add( framesPerWavelength ); options.add( pFPW ); JPanel bottomOption = new JPanel( new BorderLayout(4,4) ); harmonic = new JCheckBox("Add Harmonic", false); harmonic.setToolTipText( "Add harmonic to second channel, one octave up"); harmonic.addActionListener( new ActionListener(){ public void actionPerformed(ActionEvent ae) { setUpSound(); } } ); bottomOption.add( harmonic, BorderLayout.WEST ); frequency = new JLabel(); bottomOption.add( frequency, BorderLayout.CENTER ); options.add(bottomOption); add( options, BorderLayout.NORTH ); JPanel play = new JPanel(new BorderLayout(3,3)); play.setBorder( new EmptyBorder(4,4,4,4) ); JButton bPlay = new JButton("Code Key"); bPlay.setToolTipText("Click to make tone!"); Dimension preferredSize = bPlay.getPreferredSize(); bPlay.setPreferredSize( new Dimension( (int)preferredSize.getWidth(), (int)preferredSize.getHeight()*3) ); // TODO comment out to try KeyListener! //bPlay.setFocusable(false); bPlay.addKeyListener( new KeyAdapter(){ @Override public void keyPressed(KeyEvent ke) { loopSound(true); } } ); bPlay.addMouseListener( new MouseAdapter() { @Override public void mousePressed(MouseEvent me) { loopSound(true); } @Override public void mouseReleased(MouseEvent me) { loopSound(false); } } ); play.add( bPlay ); try { clip = AudioSystem.getClip(); final FloatControl control = (FloatControl) clip.getControl( FloatControl.Type.MASTER_GAIN ); final JSlider volume = new JSlider( JSlider.VERTICAL, (int)control.getMinimum(), (int)control.getMaximum(), (int)control.getValue() ); volume.setToolTipText("Volume of beep"); volume.addChangeListener( new ChangeListener(){ public void stateChanged(ChangeEvent ce) { control.setValue( volume.getValue() ); } } ); play.add( volume, BorderLayout.EAST ); } catch(Exception e) { e.printStackTrace(); } add(play, BorderLayout.CENTER); setUpSound(); } public void loop(int loopcount) { if (clip!=null) { clip.loop( loopcount ); } } public void setAddHarmonic(boolean addHarmonic) { harmonic.setSelected(addHarmonic); } /** Provides the slider for determining the # of frames per wavelength, primarily to allow easy adjustment by host classes. */ public JSlider getFramesPerWavelengthSlider() { return framesPerWavelength; } /** Sets the sample rate to one of the four allowable rates. Is ignored otherwise. */ public void setSampleRate(int sR) { switch (sR) { case 8000: sampleRate.setSelectedIndex(0); break; case 11025: sampleRate.setSelectedIndex(1); break; case 16000: sampleRate.setSelectedIndex(2); break; case 22050: sampleRate.setSelectedIndex(3); break; default: } } /** Sets label to current frequency settings. */ public void setFrequencyLabel() { float freq = getFrequency(); if (harmonic.isSelected()) { frequency.setText( decimalFormat.format(freq) + "(/" + decimalFormat.format(freq*2f) + ") Hz" ); } else { frequency.setText( decimalFormat.format(freq) + " Hz" ); } } /** Generate the tone and inform the user of settings. */ public void setUpSound() { try { generateTone(); setFrequencyLabel(); } catch(Exception e) { e.printStackTrace(); } } /** Provides the frequency at current settings for sample rate & frames per wavelength. */ public float getFrequency() { Integer sR = (Integer)sampleRate.getSelectedItem(); int intST = sR.intValue(); int intFPW = framesPerWavelength.getValue(); return (float)intST/(float)intFPW; } /** Loops the current Clip until a commence false is passed. */ public void loopSound(boolean commence) { if ( commence ) { clip.setFramePosition(0); clip.loop( Clip.LOOP_CONTINUOUSLY ); } else { clip.stop(); } } /** Generates a tone, and assigns it to the Clip. */ public void generateTone() throws LineUnavailableException { if ( clip!=null ) { clip.stop(); clip.close(); } else { clip = AudioSystem.getClip(); } boolean addHarmonic = harmonic.isSelected(); int intSR = ((Integer)sampleRate.getSelectedItem()).intValue(); int intFPW = framesPerWavelength.getValue(); float sampleRate = (float)intSR; // oddly, the sound does not loop well for less than // around 5 or so, wavelengths int wavelengths = 20; byte[] buf = new byte[2*intFPW*wavelengths]; AudioFormat af = new AudioFormat( sampleRate, 8, // sample size in bits 2, // channels true, // signed false // bigendian ); int maxVol = 127; for(int i=0; i 

Answer 2

如果你可以安装像Xuggler这样的其他库，你可以使用这种更短的方式，但它会加载一个外部文件 – 当然，你也可以在运行时生成声音包。 这是教程网站的一个片段。 http://www.xuggle.com/xuggler/downloads/3.1.final.jsp

 IMediaReader reader = ToolFactory.makeReader("Your.MP3"); IMediaViewer viewer = ToolFactory.makeViewer(); reader.addListener(viewer); while (reader.readPacket() == null) ;