20 Oct 2016
Manipulating Sounds in Java
Before reading or using example of this article. You must have to learn to setup eclipse environment or use Dr. Java IDE. Here are the instructions to configure and prepare eclipse environment “customize-use-bookclasses-eclipse“.
This article will help you to understand how to digitize and manipulate (e.g. splicing, reversing and blending ) sounds. BookClass library contains SoundSimple class having flexible methods to manipulate sounds. Available methods are listed below.
SimpleSound Class
| Method | Description |
| SimpleSound(String) | Create a new sound from given sound |
| SimpleSound(SimpleSound) | Create a sound by passing a simplesound instance |
| SimpleSound(int, int) | Create sound with a buffer and the AudioFileFormat, no sound file created |
| SimpleSound(int, Boolean) | Create sound with given sample size in bits and title |
| SimpleSound(int) | Create sound with a buffer and the AudioFileFormat |
| SimpleSound() | Create a simplesound 3 second long |
| writeToFile(String) | Create an audioInputStream from this sound, and write stream out to file with specified name |
| write(String) | Write sound to a file |
| toString() | Return string representation of sound |
| setSoundExplorer(SoundExplorer) | Changing the explorer of object |
| setSampleValueAt(int, int) | Set sample value at given index |
| setSampleValue(int, int) | Changes the value of the sample found at the specified frame |
| setRightSample(int, int) | |
| setLeftSample | |
| setFrame | Changes the value of each byte of the specified frame |
| setBuffer | Changes the byte array that represents this sound |
| setAudioFileFormat(AudioFileFormat) | |
| reportIndexException | |
| removePlayback(Playback) | |
| playAtRateInRange(float, int, int, Boolean) | |
| playAtRateInRange(float, int, int) | |
| playAtRateDur(double, double) | Checks the value of durInFrames |
| play() | New Playback thread and starts it |
| makeAIS() | An AudioInputStream representing this sound |
| loadFromFile(String) | Resets the fields of this sound |
| isStereo() | Check if a sound is stereo (2 channels) or not |
| getSoundExplorer() | The sound explorer |
| getSamplingRate() | The sampling rate in number of samples per second |
| getSampleValueAt(int) | Method to get the sample at the passed index and handle |
| getSampleValue(int) | Obtains the single sample contained |
| getSamples() | Return an array of SoundSample objects |
| getSample(int) | Return a SoundSample object |
| getRightSample(int) | Right sample of the audio data contained at the specified frame |
| getPlaybacks() | Returns the vector of playback threads currently active on this sound |
| getNumSamples() | Returns the number of samples in this sound |
| getLengthInFrames() | Length of the audio data contained in the file |
| getLengthInBytes() | Length of this sound in bytes |
| getLength() | Returns the length of sound as number of samples |
| getLeftSample(int) | Returns left sample of the audio data contained at the specified |
| getFrame(int) | Returns an array containing all of the bytes in the specified frame |
| getDEBUG() | Returns value of debug flag |
| getFileName() | Returns the name of file |
| getChannels() | Returns number of channels for this sound |
| getBuffer() | Returns byte array |
| getAudioFileFormat() | Returns audio file format |
| explore() | Open a sound viewer |
| blockingPlayOld() | Play the entire sound, and does not allow for any accidental mixing |
| blockingPlayAtRateInRange(float, int, int) | |
| blockingPlayAtRateDur(double, double) | Check duration in frames |
| blockingPlay() | Play sounds, then sleeps as long sound last |
| asArray() | Method to return byte array |
Here is the first example to open a sound file and play.
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package Sounds; import bookClasses.FileChooser; import bookClasses.SimpleSound; import bookClasses.SoundSample; public class MySound extends SimpleSound { /** * Constructor that takes a file name * @param fileName the name of the file */ public MySound(String fileName) { // let the parent class handle setting the file name super(fileName); } public static void main(String[] args) { //open a sound file e.g. WAV file String fileName = FileChooser.pickAFile(); //Create instance of sound MySound sound = new MySound(fileName); //Get sound samples SoundSample[] sampleArray = sound.getSamples(); //Print lenght or size of sound sample System.out.println(sampleArray.length); //play sound sound.play(); } } |
Example Audio used in example. Download it from here.
Video with code in eclipse and showing result.
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