Roland MV-8800 Appendices page 37

15 Stereo Auto Wah
Wah (Stereo Auto Wah)
This algorithm features two auto wahs arranged in parallel,
making it stereo compatible.
Filter Type
Sets the type of filter used to make the wah. (Filter
☞
parameter figure p. 16)
Value Explanation
LPF (Low pass filter) Passes frequencies below the
cutoff frequency. This allows wah over a wide
range of frequencies.
BPF (Band pass filter) Passes frequencies near the
cutoff (center) frequency. This lets you keep the
wah within a narrow range.
Trigger Sens
Value: 0–100
Sets the sensitivity level when wah is added through
changes in the source sound volume. The wah effect is
added at lower volumes as the value increases.
Peak
Value: 0–100
Sets the degree of the wah effect near the reference
frequency. The range narrows as the value increases; as
you lower the value, you get the wah effect over a wider
range.
Freq
Value: 0–100
Sets the reference frequency for the wah effect. The
higher the value is set, the higher the frequency is.
Polarity
Value: Down, Up
When applying the wah effect through changes in the
source sound volume, this setting is for selecting
whether the effect is to be in the high frequencies (Up) or
lower frequencies (Down).
LFO Rate
Value: 0–100
Sets the rate of the periodic wah sound. During Tempo
Sync, this is disabled, and you cannot make this setting.
LFO Depth
Value: 0–100
Sets the depth of periodic the wah sound.
LFO Phase
Value: 0–180 deg
This shifts the phase of the Low Frequency Oscillator
(LFO) that produces the opening/closing cycle of the
stereo wah. You can change the timing of the cyclic wah
effects in the left and right channels. At "0deg" (0
degrees), the wah effects of left and right open and close
together. At 180 degrees, they are completely opposite.
Tempo Sync
Value: OFF, , , , ,
x1 – x4
Set this when synchronizing the LFO Rate setting to the
song tempo. When not synchronizing, set this "OFF."
When you select the note, the LFO Rate setting is
disabled, and the LFO Rate is set the note length
corresponding to the song tempo.
• If the length of the note is set longer (or shorter) than that
of the possible range of the Rate settings by the change of
song tempo, the Rate can not correspond to the note
length. If "?" appears before the note symbol you set, it is
because the upper (or lower) limit of the setting range has
been exceeded, and that the synchronization is not correct.
Furthermore, the precision of the Rate setting and song
tempo differ. If left to develop over long periods, the two
may gradually drift apart.
• When you want only to get a periodic wah sound from the
LFO, set Trigger Sens to 0. Conversely, if you want the
wah effect to reflect the source sound, set the LFO depth to
0. When both are set to 0, you can use the C (Control)
knob to change the frequency, and get the "manual wah"
(pedal wah) effect.
Effect Block
, , , , , , , ,
A-37
MV-8800 Appendices