Yamaha MU90R Owner's Manual page 86

Velocity LPF Cutoff Sensitivity (VelLPFSens)
This determines the degree to which the LPF Cutoff Frequency for the
selected drum sound changes in response to velocity. In other words,
you can shift the LPF Cutoff Frequency of the filter up or down (and
thus change the timbre of the sound) depending on how hard or soft
you play the keys of a connected keyboard. Positive values raise the
LPF Cutoff Frequency and negative values lower it. A value of 00 re-
sults in no frequency change, whatever velocity is received.
HPF Cutoff Frequency (HPF Cutoff)
This determines the cutoff frequency of the high pass filter (HPF) for
the selected drum sound. The HPF filters out frequencies lower than the
cutoff point and "passes" the higher frequencies. Lower cutoff values
preserve the fundamental and lower overtones of the sound, while
higher values create a thinner, brighter tone. (For more information, see
HPF Cutoff Frequency on page 51.)
EQ Low Frequency (Low Freq)
This determines the frequency which is boosted or cut (in the Low Gain
parameter below) for the selected drum sound.
EQ Low Gain
This determines the level of the selected frequency (in Low Freq
above). Positive values boost the level of the selected frequency and
negative values attenuate it for the selected drum sound.
EQ High Frequency (High Freq)
This determines the frequency which is boosted or cut (in the High
Gain parameter below) for the selected drum sound.
MULTI MODE
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