Roland XV-3080 用户手册

These settings determine the times over which the Tone level 
setting will change from one TVA envelope level to the next.

Each TVA envelope level value determines an amount of 
change to be applied to the original Tone level setting.

The LFO (Low Frequency Oscillator) can alter various Tone 
settings in a back-and-forth, cyclic manner. Each Tone has 
two LFOs, and each can apply the desired amount of 
repetitive change to the Tone’s Pitch, TVF cutoff frequency, 
TVA Level and TVA Pan settings. This can be used as the 
Matrix Control source (p. 100, p. 140).

Applying an LFO to the Tone’s Pitch settings creates vibrato, 
applying it to its TVF cutoff frequency creates a wah-wah, 
and applying it to its TVA Level creates tremolo. When an 
LFO is applied to the Tone’s TVA Pan, the sound moves back 
and forth, from one side to another, in the stereo field.

Depending on your settings, an LFO can also be used to 
cyclically exchange two Tones. For example, if you wish to 
shift back and forth between Tones 1 and 2, select the same 
LFO settings for both, but set their LFO TVA Depth settings 
to opposite polarities – set one to a + value, and the other to a 
- value.

Since both LFOs have the same parameters, the following 
explanations applies to both.

This selects the waveform the LFO is to use.

Offset (LFO offset)

This adjusts the basic width of the LFO waveform.

sine wave

triangle wave

sawtooth wave

sawtooth wave (negative polarity)

square wave

random wave

Once the attack of the waveform output by the LFO is 

allowed to develop in standard fashion, the waveform then 
continues without further change.

Once the decay of the waveform output by the LFO is 

allowed to develop in standard fashion, the waveform then 

continues without further change.

trapezoidal wave

sample & hold wave (LFO value is changed one time 

per cycle)

chaos wave

This adjusts the basic modulation rate, or speed, of the LFO.

This setting allows you to adjust the tuning of the LFO 
waveform.[RB2]

This sets whether you want the LFO cycle to start in sync 
with the timing of a key press (ON) or not (OFF).

This sets how the LFO will be applied.

The LFO will fade in after the key is pressed.

fig.4-28.e

The LFO will be immediately applied when the key 

is pressed, and will then fade out.

fig.4-29.e

The LFO will fade in after the key is released.

fig.4-30.e

he LFO will be immediately applied when the key