Roland XV-3080 사용자 설명서

The settings for the TVF (Time Variant Filter) allow you to 
change a Rhythm Tone’s timbral content by altering its 
brightness or thickness.

This selects a filter type. A filter typically reduces, or 
attenuates, a specific frequency range within a Tone in order 
to accentuate its other frequencies.

 No filter is used.

 A Low Pass Filter reduces the volume of frequencies 

above the cutoff frequency in order to round off, or un-
brighten, the sound. This is the most common filter used in 
synthesizers.

 A Band Pass Filter reduces the volume of frequencies 

below and above the cutoff frequency range. This is most 
effective when creating sounds with strong characteristics 
since it can accentuate a desired range of frequencies 
anywhere in the sound.

 A High Pass Filter reduces the volume of the 

frequencies below the cutoff frequency. This is suitable for 
creating percussive sounds by rolling of their lower 
frequencies, thus emphasizing their higher ones.

 A Peaking Filter emphasizes frequencies around the 

cutoff frequency by raising their level. You can use this to 
create wah-wah effects by employing an LFO to change the 
cutoff frequency cyclically.

 Low Pass Filter 2. This reduces the volume of all 

frequencies above the cutoff frequency. This differs from LPF 
in that you can control the amount of the reduction using the 
TVF ENVELOPE settings while still maintaining a fixed 
cutoff frequency.

This can be very effective with acoustic-instrument-based 
Tones, since nothing is done to weaken the power and 
energy of the sound.

 Low Pass Filter 3 reduces the volume of frequencies 

above the cutoff frequency. While similar to LPF2, it filter 
reduces the frequencies more gently than LPF2.

This can be very effective with acoustic-instrument-based 
Tones, since nothing is done to weaken the power and 
energy of the sound.

This selects the frequency at which the filter begins to have 
an effect on the waveform’s frequency components.

With LPF/LPF2/LPF3 selected for the Filter Type parameter, 

lower cutoff frequency settings reduce a Rhythm Tone’s 
upper harmonics for a more rounded, warmer sound. Higher 
settings make it sound brighter.

When Filter Type is BPF, the cutoff frequency setting 
determines the range of frequencies within the Rhythm Tone 
that will be heard. This can be useful when creating 
distinctive sounds.

When Filter Type is HPF, higher settings of the cutoff 
frequency decrease the level of the Rhythm Tone’s low 
frequencies, preserving its brighter qualities.

When Filter Type is PKG, the cutoff frequency setting 
determines the range of frequencies to be emphasized.

This increases the level of the cutoff frequency to add a 
popular classic synth character to the sound. Excessively 
high settings can produce oscillation, causing the sound to 
distort.

fig.6-09.e

This sets the amount of change to the original cutoff 
frequency in response to differences in velocity, as well as the 
velocity response curve and velocity’s effect on Resonance.

This sets the amount of change to the Cutoff setting to be 
applied as a result of changes in playing velocity. With 
higher settings, there is a greater amount of change between 
softly and strongly played notes. Negative (-) settings reverse 
the direction of change.

This selects one of seven curves that determine how 
keyboard playing dynamics (velocity) influence the Rhythm 
Tone’s cutoff frequency. The selected curve is displayed 
graphically to the right of its value.

When V-Curve is set to “FIXED,” the cutoff frequency 
remains unchanged regardless of how hard or soft the keys 
are played.