Microphone does not work on Windows

[breandan]

The DialogDemo has been broken for several months, throwing with the following exception on Windows:

Exception in thread "main" java.lang.IllegalStateException: javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 16000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian not supported.
    at edu.cmu.sphinx.api.Microphone.<init>(Microphone.java:38)
    at edu.cmu.sphinx.api.SpeechSourceProvider.getMicrophone(SpeechSourceProvider.java:18)
    at edu.cmu.sphinx.api.LiveSpeechRecognizer.<init>(LiveSpeechRecognizer.java:35)
    at edu.cmu.sphinx.demo.dialog.DialogDemo.main(DialogDemo.java:144)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 16000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian not supported.
    at com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(DirectAudioDevice.java:513)
    at com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:121)
    at com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:413)
    at edu.cmu.sphinx.api.Microphone.<init>(Microphone.java:36)
    ... 8 more

This issue makes it impossible to stop recording on a LiveSpeechRecognizer and reuse the same microphone on Windows. According to @nshmyrev, this is due to be fixed soon https://sourceforge.net/p/cmusphinx/bugs/412/.

Related

• LineUnavailableException while running dialog Sample after setting up Sphinx
• Stop (not pause) LiveSpeechRecognizer?
• Can't access microphone while running Dialog demo in sphinx4 5prealpha

[nshmyrev]

Thank you for your report, there is no need to file duplicates.