The BASS_DX8_PARAMEQ type exposes the following members.
Bandwidth, in semitones, in the range from 1 to 36. Default 18 semitones.
Center frequency, in hertz, in the range from 80 to 16000. This value cannot exceed one-third of the frequency of the channel. Default 100 Hz.
Gain, in the range from -15 to 15. Default 0 dB.