The BASS_BFX_PEAKEQ type exposes the following members.
Bandwidth in octaves (0.1...4...n), Q is not in use (fBandwidth has priority over fQ). Default = 1 (0=not in use).
In most cases users should use the minimum of 0.5 octave.
The bandwidth in octaves (between -3 dB frequencies for BPF and notch or between midpoint (dBgain/2) gain frequencies for peaking EQ).
Center frequency in Hz (1Hz...nHz). Default = 1000 (max. is 1/2 of the samplerate).
Gain in dB (-15...0...+15). Default 0dB.
EE kinda definition of Q (0.1...1...n), if bandwidth is not in use. Default = 0.0 (0=not in use).
Number of bands (0...n), more bands means more memory and cpu usage. Default = 0.
A BASSFXChan flag to define on which channels to apply the effect.
Default: -1 (BASS_BFX_CHANALL) - all channels.