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    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstBaseTransform
                    ╰── GstAudioFilter
                        ╰── GstIirEqualizer
                            ╰── GstIirEqualizerNBands
The n-band equalizer element is a fully parametric equalizer. It allows to select between 1 and 64 bands and has properties on each band to change the center frequency, band width and gain.
| 1 | gst-launch-1.0 filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-nbands num-bands=15 band5::gain=6.0 ! alsasink | 
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | #include <gst/gst.h> ... typedef struct { gfloat freq; gfloat width; gfloat gain; } GstEqualizerBandState; ... GstElement *equalizer; GObject *band; gint i; GstEqualizerBandState state[] = { { 120.0, 50.0, - 3.0}, { 500.0, 20.0, 12.0}, {1503.0, 2.0, -20.0}, {6000.0, 1000.0, 6.0}, {3000.0, 120.0, 2.0} }; ... equalizer = gst_element_factory_make ("equalizer-nbands", "equalizer"); g_object_set (G_OBJECT (equalizer), "num-bands", 5, NULL); ... for (i = 0; i < 5; i++) { band = gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i); g_object_set (G_OBJECT (band), "freq", state[i].freq, "bandwidth", state[i].width, "gain", state[i].gain); g_object_unref (G_OBJECT (band)); } ... | 
| plugin | equalizer | 
| author | Benjamin Otte <otte@gnome.org>, Stefan Kost <ensonic@users.sf.net> | 
| class | Filter/Effect/Audio | 
| name | sink | 
| direction | sink | 
| presence | always | 
| details | audio/x-raw, format=(string){ S16LE, F32LE, F64LE }, rate=(int)[ 1000, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved | 
| name | src | 
| direction | source | 
| presence | always | 
| details | audio/x-raw, format=(string){ S16LE, F32LE, F64LE }, rate=(int)[ 1000, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved |