Roland MMP-2 - Manual (Page 21)

21
Using Effects
Using Effects
Because you can make the settings anywhere within this range, it’s even possible, for instance, to set all
four points so they’re stacked at the same location, and create a sharp filter.
* A frequency 3 dB lower than the flat portion of the response curve is taken to be the cutoff frequency.
Gain (GAIN)
This sets the amount by which the volume is to be increased/decreased. You can set a value within a
range of ±15.0 dB for each reference frequency.
Q (Q)
This sets the sharpness for peaks and valleys. You can set a value within a range of 0.36 to 16 for each
frequency band. When the filter type is “LPF2” or “HPF2,” making the Q larger makes the cutoff
frequency band more prominent.
On an historical note, with analog peaking equalizers and the like, the sharpness of the peaks that
occur in the response curve changes according to the performance of the coils in the resonance
circuit. For this reason, the value Q (quality factor) is used to indicate coil performance.
Filter Type (TYPE)
This chooses the type of filter for each frequency band. The available filter parameters change according
to which type of filter you choose to use. Unavailable parameters are indicated by “no.”
Dynamics
This is a group of effects that dynamically control the amount of change in the output level based on the
input level.
■ Compressor
This suppresses or lowers the output level of loud sounds to reduce changes in volume. Input signals that
exceed the threshold are suppressed by an amount determined by the Ratio parameter.
Compressor OFF/ON (COMP)
This is the On/Off switch for the compressor effect.
Reference
frequency
Gain Q
PEAK Peaking
Creates peaks and valleys around the
reference frequency
yes yes yes
LSV Low shelving
Adjusts the band lower than the
reference frequency
yes yes no
HSV High shelving
Adjusts the band higher than the
reference frequency
yes yes no
LPF1 Low-pass filter 1st
Passes only sound lower than the
reference frequency
yes no no
HPF1 High-pass filter 1st
Passes only sound higher than the
reference frequency
yes no no
LPF2 Low-pass filter 2nd Steeper response curve than “LPF1” yes no yes
HPF2 High-pass filter 2nd Steeper response curve than “HPF1” yes no yes
BPF Band-pass filter
Passes only sound near the reference
frequency
yes no yes
BRF Band-reject filter
Blocks only sound near the reference
frequency
yes no yes
THRU Thru Passes the audio without modification no no no