Roland XP-30 User Manual

These parameters determine how keyboard velocity will 
affect TVF Envelope/Cutoff Frequency/Resonance.

Use this parameter when you want velocity to affect the TVF 
Envelope. Higher settings will result in a greater difference 
between strongly and softly played notes. Negative (-) 
settings will invert the effect.

Select one of 7 types of curve with which velocity will affect 
the Cutoff Frequency. The curve is displayed graphically at 
the right of the value.

Use this parameter when you want velocity to affect the 
Resonance. Higher settings will result in a greater difference 
between strongly and softly played notes. Negative (-) 
settings will invert the effect.

These parameters determine how keyboard velocity will 
affect the times of the TVF envelope.

Use this parameter when you want velocity to affect T1 
(time) of the TVF envelope. Higher settings will result in a 
greater difference between strongly and softly played notes. 
If you want higher keyboard velocities to speed up the T1 
time, use positive (+) settings. To slow down the T1 time, use 
negative (-) settings.

Use this parameter when you want Key Off Velocity (the 
speed at which you release a key) to affect T4 (time) of the 
TVF envelope. Higher settings will result in a greater 
difference between quickly and slowly released notes. If you 
want a quicker release to speed up the T4 time, use positive 
(+) settings. To slow down the T4 time, use negative (-) 
settings.

Use this parameter when you want keyboard position to 
affect the times (T2–T4) of the TVF envelope. Higher settings 
will result in greater changes relative to middle C (C4). 
Positive (+) settings will result in shorter times as you play 
toward the right of the keyboard. Negative (-) settings will 
conversely result in longer times.

These parameters set the TVF envelope (the way in which the 
cutoff frequency will change over time).

fig.3-44.e

Set the times over which the cutoff frequency will move from 
one point to the next.

Set the cutoff frequency levels for each point, relative to the 
basic
cutoff frequency.

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The TVA (Time Variant Amplifier) controls volume changes 
and stereo location.

Adjust the basic volume of the Tone. Use this parameter to 
adjust the volume balance between Tones.

Adjust the pan (stereo location) of the Tone. L64 is full left, 0 
is center, and 63R is full right.

Use this parameter when you want keyboard velocity to 
affect the amount of change produced by the TVA envelope. 
Higher settings will result in a greater difference between 
strongly and softly played notes. Negative (-) settings will 
invert the effect.

Select one of 7 curves that will determine how keyboard 
playing dynamics will affect the TVA envelope. The selected 
curve will be displayed at the right of the numerical value.

T1

T2

T3

T4

L3

L1

L2

L4