Invalid audio source.

Hello i have a error:

Code:

  java.lang.IllegalArgumentException: Invalid audio source.
    at android.media.AudioRecord.audioParamCheck(AudioRecord.java)
    at android.media.AudioRecord.<init>(AudioRecord.java)
    at android.media.AudioRecord.<init>(AudioRecord.java)
    at anywheresoftware.b4a.audio.AudioStreamer.Initialize2(AudioStreamer.java:79)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:747)
    at...  

Invalid audio source.

from B4X Community - Android, iOS, desktop, server and IoT programming tools http://ift.tt/1X2slF1
via IFTTT