Roland XV-5080 owner manual Cutoff, TVF Velo TVF Velocity, 153

keyboard to select the pertial.

Chapter 4 Creating Patches

PATCH TVF Parameter page ([PATCH] - [F3 (TVF)] - [F1 (TVF Prm)])

TVF

Filter Type (TVF Filter Type)

Selects the filter type. A filter typically reduces, or attenuates, a specific frequency range within a Tone in order to accentuate its other frequencies.

LPF	BPF	HPF
Level
High
Frequency
Cutoff frequency
parameter value
Low
Cutoff

Keyfollow Point

PKG

Chap.4

Available Settings:

OFF: No filter is used.

LPF: Low Pass Filter. This reduces the volume of all frequencies above the cutoff frequency. Since the high frequency range is cut, the sound will become more mellow. This is the most frequently-used type of filter.

BPF: Band Pass Filter. This type of filter leaves only the region in the vicinity of the cutoff frequency, and cuts the rest. It is useful for making distinctive sounds.

HPF: High Pass Filter. This type of filter cuts the portion that lies below the cutoff frequency. It is useful for making percussive or other sounds. that have a distinctive high range.

Cutoff Freq (TVF Cutoff Frequency)

Range: 0–127

Specifies the frequency (cutoff frequency) at which the filter will begin to affect the frequency characteristics of the waveform.

Resonance (TVF Resonance)

Range: 0–127

Increases the level of the cutoff frequency, adding character to the sound. Excessively high settings can produce oscillation, causing the sound to distort.

Range: A0–C8

Determines the key used for the center of the key follow effect. The two independent parameters controlled by key follow (cutoff frequency and envelope time) are both affected by the Key Follow Point set here.

Keyfollow (Cutoff Frequency Keyfollow)

Range: -63– +63

Changes the cutoff frequency relative to the key follow point. Positive (+) settings cause the cutoff frequency to rise for notes higher than the key follow point, and negative (-) settings cause the cutoff frequency to fall for notes higher than the key follow point. Higher values will cause greater change.

TVF Velo (TVF Velocity)

Curve (Velocity Curve)

Range: 1–4

Selects the curve which corresponds to the velocity value and the cutoff frequency. The selected curve is displayed graphically to the right of its value. When this is set to “1,” velocity has no effect on the cutoff frequency.

Sens (Velocity Curve Sens)

Range: -63– +63

Determines the depth and polarity (positive/negative) of the velocity curve.

A curve effect can be gained by setting the velocity curve to higher values close to 63. Setting this close to 0 results in little change in the cutoff frequency. With negative values, the effect becomes reversed.

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