Yamaha FS1R Owner's Manual page 54

• 03: Type
Filter Type
Settings: LPF24, LPF18, LPF12, HPF, BPF, BEF
Determines the type of filter response used.
The "LPF" (Low Pass Filter) settings produces a filter response that allows only frequencies below the cutoff
frequency (See "Cutoff Freq" below) to pass. The "LPF24" filter type has a steep -24dB/octave cutoff slope, the
"LPF18" has a less steep -18dB/octave slope, and the "LPF" type has a gentler -12dB/octave slope.
HPF
The "HPF" (High Pass Filter) setting produces a filter response that allows only frequencies above the cutoff
frequency (See "Freq" below) to pass.
BPF
The "BPF" (Band Pass Filter) setting produces a filter response that allows only a band of frequencies centered at
the cutoff frequency (See "Freq" below) to pass.
BEF
The "BEF" (Band Elimination Filter) setting produces a filter response that eliminates a band of frequencies centered
at the cutoff frequency (See "Freq" below) to pass.
Level
Range passed Cutoff range
Cutoff Frequency
Level
Cutoff range Range passed
Cutoff frequency
Level
Cutoff range Range passed Cutoff range
Center frequency
Level
Range passed Cutoff range
Center frequency
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-12db/oct
-18db/oct
-24db/oct
Frequency
Frequency
Frequency
Range passed
Frequency