Java's sound API doesn't work with all .WAV files?

Question

I am currently having trouble playing around with the javax.sound.sampled library. Here\'s the MCV code that I use to play my audio files:

import ja         


        

Answer 1

You can use the following code to get a list of the supported formats for playback:

public static List getSupportedAudioFormats() {
    List result = new ArrayList<>();
    for (Line.Info info : AudioSystem.getSourceLineInfo(
                new Line.Info(SourceDataLine.class))) {
        if (info instanceof SourceDataLine.Info) {
            Collections.addAll(result, ((SourceDataLine.Info) info).getFormats());
        }
    }
    return result;
}

AudioFormat.Encoding lists the encodings supported by javax.sound.sampled.

A safe WAV audio format is 16-bit PCM at 44100Hz.

You can discover the format of a particular file with:

File file = new File("path_to_file.wav");
AudioFormat fmt = AudioSystem.getAudioFileFormat(file).getFormat();

This will be a little more lenient than trying to get a line for example, but it will still throw if the WAV file has e.g. mp3 data. A WAV file is a container that can store encodings beyond PCM, some of which javax.sound.sampled does not normally support.