java - reading, manipulating and writing wav files

Question

In a java program, what is the best way to read an audio file (wav file) to an array of numbers (float[], short[],...), and to write a wav file from an array of numbers?

Answer 1

Wave files are supported by the javax.sound.sample package

Since isn't a trivial API you should read an articel / tutorial which introduces the API like

Java Sound, An Introduction

Answer 2

Some more detail on what you'd like to achieve would be helpful. If raw WAV data is okay for you, simply use a FileInputStream and probably a Scanner to turn it into numbers. But let me try to give you some meaningful sample code to get you started:

There is a class called com.sun.media.sound.WaveFileWriter for this purpose.

InputStream in = ...;
OutputStream out = ...;

AudioInputStream in = AudioSystem.getAudioInputStream(in);

WaveFileWriter writer = new WaveFileWriter();
writer.write(in, AudioFileFormat.Type.WAVE, outStream);

You could implement your own AudioInputStream that does whatever voodoo to turn your number arrays into audio data.

writer.write(new VoodooAudioInputStream(numbers), AudioFileFormat.Type.WAVE, outStream);

As @stacker mentioned, you should get yourself familiar with the API of course.