Adds a 21-band equalizer audio effect to an Audio bus. Gives you control over frequencies from 22 Hz to 22000 Hz. Each frequency can be modulated between -60/+24 dB. Frequency bands : Band 1 : 22 Hz Band 2 : 32 Hz Band 3 : 44 Hz Band 4 : 63 Hz Band 5 : 90 Hz Band 6 : 125 Hz Band 7 : 175 Hz Band 8 : 250 Hz Band 9 : 350 Hz Band 10 : 500 Hz Band 11 : 700 Hz Band 12 : 1000 Hz Band 13 : 1400 Hz Band 14 : 2000 Hz Band 15 : 2800 Hz Band 16 : 4000 Hz Band 17 : 5600 Hz Band 18 : 8000 Hz Band 19 : 11000 Hz Band 20 : 16000 Hz Band 21 : 22000 Hz See also [AudioEffectEQ], [AudioEffectEQ6], [AudioEffectEQ10].