Roland XV-88 owner manual Modulating Sounds LFO, LFO1/LFO2 Wave

Time (Tone Delay Time)

Specifies the time from when the key is pressed (or if the Mode parameter is set to KEY-OFF-NORMAL or KEY-OFF- DECAY, the time from when the key is released) until when the Tone will sound.

Tone Delay Time specifies the beat length for the synchronized tempo when the tempo that specifies the elapsed time until the Tone is sounded (Patch Tempo) is synchronized with the tempo set in a connected sequencer (external tempo).

<Example>

For a tempo of 120 (120 quarter notes occur in 1 minute (60 seconds))

Setting	Delay time
(half note)	1 second (60 / 60 =1 (second))
(quarter note)	0.5 seconds (60 / 120= 0.5 (seconds))
(eighth note)	0.25 seconds (60 / 240= 0.25 (seconds))

Modulating Sounds (LFO)

An LFO (Low Frequency Oscillator) causes change over a cycle in a sound. Each Tone has two LFOs (LFO1/LFO2), and these can be used to cyclically change the pitch, cutoff frequency and volume to create modulation-type effects such as vibrato, wah and tremolo. Since both LFOs have the same parameters, the following explanation will cover both of them.

LFO1/LFO2 WAVE

Form (LFO Waveform)

Specifies 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.

Chapter 5. Creating Patches

: 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 and Hold wave (LFO value is changed one time per cycle)

: Chaos wave
When setting	or	, set the KeySync

parameter to ON. If this is OFF, it will have no effect.

Ofset (LFO Level Offset)

Adjusts the LFO waveform up or down from the center value (pitch or cutoff frequency). Positive (+) settings will move the waveform up from the center value. Negative (-) settings will move it down from the center value.

Rate (LFO Rate) ★

Adjusts the modulation rate, or speed, of the LFO.

LFO Rate sets the beat length for the synchronized tempo when the tempo that specifies the LFO cycle (Patch Tempo) is synchronized with the tempo set in a connected sequencer (external tempo).

<Example>

For a tempo of 120 (120 quarter notes occur in 1 minute (60 seconds))

Setting	Delay time
(half note)	1 second (60 / 60 =1 (second))
(quarter note)	0.5 seconds (60 / 120= 0.5 (seconds))
(eighth note)	0.25 seconds (60 / 240= 0.25 (seconds))

When is selected for the Form parameter, this setting will be ignored.

Detune (LFO Rate Detune)

LFO Part Detune makes subtle changes in the LFO cycle rate (Rate parameter) each time a key is pressed. Higher settings will cause greater change.

KeySync (LFO Key Sync)

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

Chapter 5

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