1 - Roland

Chapter 3. Creating Your Own Sounds
Pan
Adjust the stereo position of the Patch. A setting of L64 is far
left, 0 is center, and 63R is far right.
Analog Feel (Analog Feel Depth)
Adjust the depth at which 1/f modulation is applied to the Patch.
1/f Modulation
“1/f” is a mathematical ratio that expresses the amount
of “predictable randomness” occurring in natural
sounds that the human ear finds pleasing, such as soft
breezes or gentle brooks. The XP-30 is able to modulate
the pitch and volume of sounds by this ratio to create
the warmth characteristic of early analog synthesizers.
Priority (Voice Priority)
Specify which currently-sounding notes will take priority
when notes are turned off to make room for newly-requested
notes that would exceed the limit of 64 simultaneous voices.
LAST: Notes played later will take priority. When the
65th voice is requested, the first-played of the
currently sounding notes will be turned off.
LOUDEST: Louder notes will take priority. When the 65th
voice is requested, the softest of the currently
sounding notes will be turned off.
VelRang (Velocity Range Switch)
Specify whether the Velocity Range setting (see following
display) will be used or not. The Velocity Range setting will
be used when the VelRange parameter is ON.
Octave (Octave Shift)
Specify the transposition of the Patch when played on the
keyboard, in units of one octave (-3–+3 octaves).
Stretch (Stretch Tuning Depth)
Select the stretch tuning curve. The selected curve will affect the
way in which notes of a chord sound with each other. The diagram
below shows the tuning curves which can be selected. In the
“tuning curve,” the horizontal axis represents the scale, and the
vertical axis represents pitch difference relative to equal
temperament. When OFF is selected for this parameter, the notes of
the keyboard will be in mathematically equal temperament. With a
setting of 3, the high and low note ranges will be stretched the most.
fig.3-23.e
Pitch difference from
equal temperament
OFF
1
2
3
Low note range
Parameter value
3
2
1
OFF
High note range
VELOCITY (Velocity Range)
These parameters specify the range of velocities that will
play the Tone. This can be used to make notes of different
strengths play different Tones.
* To make Velocity Range settings, the Velocity Range Switch in
the previous display must be turned ON.
Lower (Velocity Range Lower)
Specify the lower velocity limit. Although it also depends on
the Cross Fade settings, notes played softer than this limit will
not sound the Tone, or will produce extremely quiet sounds.
Upper (Velocity Range Upper)
Specify the upper velocity limit. Although it also depends on
the Cross Fade settings, notes played more strongly than this
limit will not sound the Tone, or will produce extremely
quiet sounds.
* It is not possible to set Lower to a value greater than Upper, nor
Upper to a value less than Lower. If you attempt to do so, the
two values will change together.
Cross Fade (Velocity Cross Fade)
Specify the way in which the volume of the Tone will change
when the velocity of a note falls outside of the specified Velocity
Range. Higher settings will result in a more gradual change in
volume. If you do not want the Tone to sound at all for
velocities outside the specified range, set this parameter to 0.
fig.3-24.e
Level
Chapter 3
Stretched Tuning
Acoustic pianos are normally tuned so that the high note
range is a bit sharper and the low note range is a bit flatter
than a mathematically calculated equal temperament (i.e.,
where each octave would be precisely double the
frequency of the previous octave). This is done simply
because pianos sound better when tuned this way.
1
Lower
parameter value
Upper
parameter value
Velocity
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