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Ubuntu 16.4, Java, WAV file playback

This is a weird thing. I'm trying to playback some sounds via Java AudioSystem and AudioSystem.getClip(). The files are all "PCM_SIGNED, 22.050.0 Hz, 16 bit, mono, 2 bytes/frame, little endian".
On several Ubuntu 16.4 LTS Linux boxes this format is rejected by PulseAudio with an Invalid Format Exception, because the only accepted format is seemingly "PCM_SIGNED, unknown sample rate, 16 bit, stereo, 4 bytes/frame, big endian".
I already tried to re-sample my WAVs in order to match this strange constraint, to no avail. Those are not even accepted anymore by AudioSystem.getAudioInputStream()
Needless to say, that the same works fine on Mac OS and Windows. And there is also no problem to playback these files using the sox library and play file.wav

OK, solved.
Usually if one asks, how to playback WAV using Java, this is the most common answer:
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(DragonflyApp.class.getResource("/resources/" + soundFile));
clip = AudioSystem.getClip();
clip.addLineListener(e -> {
if (e.getType() == LineEvent.Type.STOP) {
// Do something on end of playback
}
});
clip.open(audioInputStream);
clip.start();
Unfortunately on some Linux systems this ends up in an "Invalid Format" exception, thrown by PulseAudio, which claims to be unable to playback the simplest WAV file (see above).
The workaround is to use this sequence under Linux instead. It generally does also work on MacOS, but the final "STOP" indication comes very late (roughly 5s after playback end), so I make a conditional execution here:
This works on Linux (at least on Ubunutu 16.04) with clips, which have formerly been rejected by PulseAudio:
DataPusher datapusher = null;
DataLine.Info lineinfo = null;
SourceDataLine sourcedataline = null;
lineinfo = new DataLine.Info(SourceDataLine.class, audioInputStream.getFormat());
if (!(AudioSystem.isLineSupported(lineinfo))) {
return;
}
sourcedataline = (SourceDataLine) AudioSystem.getLine(lineinfo);
sourcedataline.addLineListener(e -> {
if (e.getType() == LineEvent.Type.STOP) {
// Do something on end of playback
}
});
datapusher = new DataPusher(sourcedataline, audioInputStream);
datapusher.start();
Both code snippets are used conditionally:
if (System.getProperty("os.name").equals("Mac OS X")) {
// The clip solution
}
else {
// The datapusher solution
}
Hope, that helps others, who will also have this problem.

AudioPlayer not playing sound on a mac with java 1.6

I wrote a media player, that I exported as a jar file.
It works great on my linux system. Compiled with 1.8, but to work with 1.6 as well.
Now my friend who needs to use it runs the jar on her mac (java 1.6) and the program works, does not throw an exception, but does not play sound.
Any ideas what could have gone wrong?
public void mediaPlayer()
throws Exception {
// open the sound file as a Java input stream
String soundFile = "./data/1.wav";
InputStream in = new FileInputStream(soundFile);
//
// // create an audiostream from the inputstream
AudioStream audioStream = new AudioStream(in);
// // play the audio clip with the audioplayer class
AudioPlayer.player.start(audioStream);
}

Oh, the data folder was misplaced. Solved.

Issue playing audio with Stackoverflow's javasound tag example

Reading about the javasound tag earlier today, I tried to implement the simple code that we can see there (with some minor modifications, such as using File instead of URL):
File file = new File(System.getProperty("user.dir") + "/sound.wav");
Clip clip = AudioSystem.getClip();
AudioInputStream ais = AudioSystem.getAudioInputStream(file);
clip.open(ais); // exception
But I'm getting a java.lang.IllegalArgumentException: Invalid format when I try to open the AudioInputStream that we see there.
However, when I try it with the following code that I got from the internet
File file = new File(System.getProperty("user.dir") + "/sound.wav");
AudioInputStream ais = AudioSystem.getAudioInputStream(file);
AudioFormat format = ais.getFormat();
DataLine.Info info = new DataLine.Info(Clip.class, format);
Clip clip = (Clip)AudioSystem.getLine(info);
clip.open(ais);
clip.start();
it does work: sound.wav is played correctly - however, I find this to be clunky for something that should be as simple as our first example, given on the javasound tag itself.
By reading the documentation from clip, I acknowledged that IllegalArgumentException is thrown when [...] the stream's audio format is not fully specified or invalid. However, it does seem to be a valid format.
What is wrong with our first example here? AudioSystem.getAudioInputStream() does accept a File as argument, and, as visible from the second example, it does appear to have valid audio file data, because it works. Am I missing something obvious? And, if so, shouldn't it be pointed out on javasound tag?

After some research I found out that it could have something to do with the system properties. In those properties you can specify defaults for the getLine() methods (getLine(), getClip(), getSourceDataLine() and getTargetDataLine()). If you call one of these methods, Java does the following (AudioSystem description):
The system property javax.sound.sampled.Clip is set to
javax.sound.sampled.Clip = great.Mixer#great.clip.Clap
The Mixer class is called great.Mixer and the Clip is called great.clip.Clap
When you request a Clip, Java checks the following:
If the Mixer great.Mixer is found and contains the Clip great.clip.Clap, return this Clip
If the Mixer great.Mixer is found, but does not contain the Clip great.clip.Clap, return the first Clip specified in the Mixer
If the Mixer great.Mixer does not contain any Clips or if it isn't found, return the first instance of great.clip.Clap in any Mixer
If no Mixer contains great.clip.Clap, return the first Clip of the first Mixer found
If no Clip is specified in any Mixer, throw an IllegalArgumentException
What that means is that if you are getting an IllegalArgumentException, no Clips are installed in any Mixers.
With
DataLine.Info info = new DataLine.Info(Clip.class, format);
you are defining a new Clip. Which means your next Call to a getLine() method will return this object instead of giving you an error.

How can I play an ALAW file in a Java application?

I need to be able to play ALAW files in a Java (desktop) application.
I've tried to follow the example at:
How to play audio in Java Application
I've created a File object from the ALAW file (which exists, according to check) and sent that File to a method where the first thing that happens is this:
AudioInputStream ais = AudioSystem.getAudioInputStream(file);
But this is where the execution stops, since I get this exception:
javax.sound.sampled.UnsupportedAudioFileException: could not get audio input stream from input file
I see that there is a way to convert ALAW files if the check (ais.getFormat().getEncoding() == AudioFormat.Encoding.ALAW) is true, but how can I get there if it's not even possible to create the AudioInputStream?
Anyone who has worked with ALAW files and has an idea of what I should do?
Is there a way to convert the ALAW files programmatically before calling AudioSystem.getAudioInputStream(file)?
I really need to make this work!

Get existing file format from your AudioInputStream:
filepath is String with path to your file,which you obtain for example:
String filename="x.y";
File file = new File(filename);
String filepath=file.getCanonicalPath();
Then main conversion is done by:
AudioInputStream inputStream = AudioSystem.getAudioInputStream(new File(filepath));
AudioFormat format = inputStream.getFormat();
AudioInputStream convertedInputStream;
After that put condition, which checks if your file encoding is alaw or ulaw, and converts it to PCM which can be played by SoundCard:
if ((format.getEncoding() == AudioFormat.Encoding.ULAW) || (format.getEncoding() == AudioFormat.Encoding.ALAW))
AudioFormat tmp = new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
format.getSampleSizeInBits() * 2,
format.getChannels(),
format.getFrameSize() * 2,
format.getFrameRate(), true);
convertedInputStream = AudioSystem.getAudioInputStream(tmp,inputStream);
format = tmp;}
This code will convert ALAW/ULAW format of your AudioInputStream to PCM_SIGNED

JMF will help in this case.
http://www2.sys-con.com/itsg/virtualcd/java/archives/0503/decarmo/index.html

Retriving a file from MS Server 2005 using Java

What I'm trying to do is when a user hits a link with the correct parameters, the system will retrieve the file from the MS Server 2005 db and outputs it to the user. Specifically, I stored an audio file in varbinary data type and now I have the ID to retrieve the audio file but I don't know what is the Java command to output it for the user.
My code is written in Java and I tried to search for a similar topic on here but had no luck. Any help is appreciated.
Thanks
-Bao

There is one example for file downloading here, maybe is helpful:
http://www.daniweb.com/software-development/java/threads/154128
Maybe you can try to combine that with your link handler.

I figured it out. This is the solution that did the job for me. Basically I had to use the javax.sound.sampled.* API. This is what I did below:
InputParameters parameters = parts.getParameters();
int audioFileID = parameters.getIntParameter("audiofileID");
//Retrieves Audio File
AudioFile audioFile = CallManager.getAudioFile(audioFileID);
InputStream is = new ByteArrayInputStream(audioFile.getAudio());
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(is);
ServletOutputStream out = response.getOutputStream();
ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
AudioFormat format = audioInputStream.getFormat();
audioInputStream = AudioSystem.getAudioInputStream(format, audioInputStream);
}
AudioSystem.write(audioInputStream,javax.sound.sampled.AudioFileFormat.Type.WAVE,byteOutputStream);