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diff --git a/gst/equalizer/gstiirequalizer3bands.c b/gst/equalizer/gstiirequalizer3bands.c
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+++ b/gst/equalizer/gstiirequalizer3bands.c
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+/* GStreamer
+ * Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-equalizer-3bands
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * The 3 band equalizer element changes the frequency spectrum of the audio data.
+ * </para>
+ * <para>
+ * <programlisting>
+ * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-3bands band1=-1.0 ! alsasink
+ * </programlisting>
+ * This lowers the volume of the 2nd band which is at 632 Hz by FIXME db.
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstiirequalizer.h"
+#include "gstiirequalizer3bands.h"
+
+
+enum
+{
+  ARG_BAND0 = 1,
+  ARG_BAND1,
+  ARG_BAND2,
+};
+
+static void gst_iir_equalizer_3bands_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_iir_equalizer_3bands_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+GST_DEBUG_CATEGORY_EXTERN ()(equalizer_debug);
+#define GST_CAT_DEFAULT equalizer_debug
+
+GST_BOILERPLATE (GstIirEqualizer3Bands, gst_iir_equalizer_3bands,
+    GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
+
+/* equalizer implementation */
+
+static void
+gst_iir_equalizer_3bands_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+  const GstElementDetails iir_equalizer_details =
+      GST_ELEMENT_DETAILS ("3 Band Equalizer",
+      "Filter/Effect/Audio",
+      "Direct Form 3 band IIR equalizer",
+      "Stefan Kost <ensonic@users.sf.net>");
+
+  gst_element_class_set_details (element_class, &iir_equalizer_details);
+}
+
+static void
+gst_iir_equalizer_3bands_class_init (GstIirEqualizer3BandsClass * klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+
+  gobject_class->set_property = gst_iir_equalizer_3bands_set_property;
+  gobject_class->get_property = gst_iir_equalizer_3bands_get_property;
+
+  g_object_class_install_property (gobject_class, ARG_BAND0,
+      g_param_spec_double ("band0", "20 Hz",
+          "gain for the frequency band 20 Hz, ranging from -1.0 to +1.0",
+          -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+  g_object_class_install_property (gobject_class, ARG_BAND1,
+      g_param_spec_double ("band1", "632 Hz",
+          "gain for the frequency band 632 Hz, ranging from -1.0 to +1.0",
+          -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+  g_object_class_install_property (gobject_class, ARG_BAND2,
+      g_param_spec_double ("band2", "20 kHz",
+          "gain for the frequency band 20 kHz, ranging from -1.0 to +1.0",
+          -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+}
+
+static void
+gst_iir_equalizer_3bands_init (GstIirEqualizer3Bands * equ_n,
+    GstIirEqualizer3BandsClass * g_class)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
+
+  gst_iir_equalizer_compute_frequencies (equ, 3);
+}
+
+static void
+gst_iir_equalizer_3bands_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+  switch (prop_id) {
+    case ARG_BAND0:
+      gst_child_proxy_set_property (GST_OBJECT (equ), "band0::gain", value);
+      break;
+    case ARG_BAND1:
+      gst_child_proxy_set_property (GST_OBJECT (equ), "band1::gain", value);
+      break;
+    case ARG_BAND2:
+      gst_child_proxy_set_property (GST_OBJECT (equ), "band2::gain", value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_iir_equalizer_3bands_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+  switch (prop_id) {
+    case ARG_BAND0:
+      gst_child_proxy_get_property (GST_OBJECT (equ), "band0::gain", value);
+      break;
+    case ARG_BAND1:
+      gst_child_proxy_get_property (GST_OBJECT (equ), "band1::gain", value);
+      break;
+    case ARG_BAND2:
+      gst_child_proxy_get_property (GST_OBJECT (equ), "band2::gain", value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}