[gstreamer-bugs] [Bug 613852] New: Audio loopback at 16khz produces "clicks"

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=613852
  GStreamer | don't know | 0.10.28

           Summary: Audio loopback at 16khz produces "clicks"
    Classification: Desktop
           Product: GStreamer
           Version: 0.10.28
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: don't know
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: bernie at codewiz.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


On several HW/OS combinations, the following pypeline breaks produces "clicks"
rather than the expected loopback from the microphone to the speaker:

  gst-launch-0.10 alsasrc ! audio/x-raw-int,rate=16000,channels=1,depth=16 !
wavenc ! decodebin ! autoaudiosink


Works on:

 * Lenovo x200s, Fedora 12 x86-64, gstreamer-0.10.28-2.fc12.x86_64

Breaks on:

 * OLPC XO-1, Fedora 11, gstreamer 0.10.26
 * OLPC XO-1, Fedora 11, gstreamer 0.10.28
 * Netbook with Intel HDA sound, running Ubuntu Karmic, gstreamer 0.10.28
 * Laptop with Intel HDA sound, running Ubuntu Jaunty, gstreamer 0.10.25

I'm not sure whether this is a gstreamer bug, alsa bug or sound driver bug.

This bug affects recording sound in a Sugar activity called Record. The bug is
described in detail here:

  http://bugs.sugarlabs.org/ticket/1244

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