[Bug 782711] New: equalizer-10bands: a 59 Hz test signal amplitude increases when band0(29Hz) gain is reduced

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=782711

            Bug ID: 782711
           Summary: equalizer-10bands: a 59 Hz test signal amplitude
                    increases when band0(29Hz) gain is reduced
    Classification: Platform
           Product: GStreamer
           Version: 1.12.0
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: wellingtonwallace at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

When I send a 59 Hz test signal to the equalizer its amplitude increases when I
reduce band0 gain. I could reproduce this with the following commands:

gst-launch-1.0 audiotestsrc freq=59 ! equalizer-10bands band0=12 ! pulsesink

gst-launch-1.0 audiotestsrc freq=59 ! equalizer-10bands band0=-24 ! pulsesink

I can hear a louder sound with the second command. When the test signal has a
frequency of 29 Hz the sound amplitude decreases when band0 gain is reduced as
I would expect. So it has something to do with the overlap between band0 and
band1.

I am using gstreamer 1.12.0 on Arch Linux.

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