Roland XP-30 Changing the Sound’s Volume Stereo Location TVA, TVF Velocity, TVF Envelope, Tva

TVF VELOCITY

These parameters determine how keyboard velocity will

affect TVF Envelope/Cutoff Frequency/Resonance.

Chapter 3. Creating Your Own Sounds

TVF ENVELOPE

These parameters set the TVF envelope (the way in which the

cutoff frequency will change over time).

V-Sens (TVF Envelope Velocity Sensitivity)

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.

V-Curve (TVF Envelope Velocity Curve)

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

Cutoff Frequency

T1	T2	T3	T4
	L1
	L2		L3
			L4
			Time
key is pressed			key is released

the right of the value.

V-Resonance (Resonance Velocity Sensitivity)

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.

TVF TIME ENV (TVF Time Envelope)

These parameters determine how keyboard velocity will

affect the times of the TVF envelope.

V-T1 (TVF Envelope Time 1 Velocity Sensitivity)

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.

V-T4 (TVF Envelope Time 4 Velocity Sensitivity)

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.

Time Keyfollow (TVF Envelope Time Key Follow)

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.

T1–T4 (TVF Envelope Time 1–4)

Set the times over which the cutoff frequency will move from

one point to the next.

L1–L4 (TVF Envelope Level 1–4)

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

basic

cutoff frequency.

■Changing the Sound’s Volume

and Stereo Location (TVA)

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

TVA

Level

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

Pan

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

V-Sens (TVA Envelope Velocity Sensitivity)

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.

V-Curve (TVA Envelope Velocity Curve)

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.

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