使用 Java 在 Raspberry 上播放 wav 文件

Question

How can I reproduce a.wav file using Java on Raspberry (OS: Raspbian)? I tried this and it worked, but not anymore: now the program crashes when it tries to play the file (and I don't know why):

try{
   File adv = new File(pathRasp+"Suoni/avviso20.wav");
   Clip clip = AudioSystem.getClip();
   clip.open(AudioSystem.getAudioInputStream(adv));
   clip.start();
}catch(IOException | LineUnavailableException | UnsupportedAudioFileException ex){
   System.out.println("ERROR" + ex);
}

Anyone know any other ways to reproduce.wav files?

Answer 1

I found this blog post which may or may not help:

https://nealvs.wordpress.com/2017/08/11/java-sound-on-a-raspberry-pi-with-openjdk/

I was pretty bummed when my sound stopped playing on my Raspberry Pi when I switched to OpenJDK 8 after originally using Oracle JDK 8.

Editing the sound.properties for the OpenJDK solved my problem.

sudo vim /etc/java-8-openjdk/sound.properties

Comment out the icedtea classpath configs:

#javax.sound.sampled.Clip=org.classpath.icedtea.pulseaudio.PulseAudioMixerProvider #javax.sound.sampled.Port=org.classpath.icedtea.pulseaudio.PulseAudioMixerProvider #javax.sound.sampled.SourceDataLine=org.classpath.icedtea.pulseaudio.PulseAudioMixerProvider #javax.sound.sampled.TargetDataLine=org.classpath.icedtea.pulseaudio.PulseAudioMixerProvider

Remove the comments from the sun classpath configs:

javax.sound.sampled.Clip=com.sun.media.sound.DirectAudioDeviceProvider javax.sound.sampled.Port=com.sun.media.sound.PortMixerProvider javax.sound.sampled.SourceDataLine=com.sun.media.sound.DirectAudioDeviceProvider javax.sound.sampled.TargetDataLine=com.sun.media.sound.DirectAudioDeviceProvider

Problem solved.

In other words, you might have a different JDK between your Windows and Raspi, and they need different configuration.