Roland XP-80 Owner's Manual download pdf (Page 69)

Changing the tone (filter) of a Rhythm

tone (Key TVF)

✳

The Key TVF group consists of the TVF Param and

TVF Envelope display pages. To switch between these

two, press [F3] (Key TVF).

TVF Param (TVF parameter) display

This display is for TVF (Time Variant Filter) settings. By

changing a sound’s brightness or thickness, a Rhythm Tone

can be modified. Frequency characteristics of the filter are

displayed graphically.

Filter Type

Selects the filter type. A filter attenuates a specific frequency

range to modify the brightness or thickness of sound.

OFF

: No filter is used.

LPF

: Low Pass Filter cuts frequencies above the cutoff fre-

quency to round off the sound. This is the most common fil-

ter used in synthesizers.

BPF

: Band Pass Filter cuts frequencies below and above the

cutoff frequency range. Most effective for creating sounds

with strong characteristics.

HPF

: High Pass Filter cuts the frequencies below the cutoff

frequency. Suitable for creating percussive sounds empha-

sizing highs.

PKG

: Peaking Filter emphasizes frequencies around the cut-

off frequency. This expresses the special sound of a drum.

Cutoff Frequency

Sets the frequency at which the filter starts to have an effect

(cutoff frequency) on the waveform’s frequency compo-

nents.

With LPF selected for the Filter Type parameter, lower

Cutoff Frequency settings will reduce upper harmonics for a

more rounded sound. Higher settings will make sound

brighter.

If BPF is selected, harmonic components will change

depending on the Cutoff Frequency setting. Using this set-

ting effectively will create some highly distinctive sounds.

With HPF selected, higher Cutoff Frequency settings will

reduce lower harmonics to emphasize just the brighter com-

ponents of the sound.

With PKG selected, the harmonics to be emphasized will

vary depending on Cutoff Frequency setting.

Resonance

Emphasizes frequencies around the cutoff frequency.

Excessive level at some settings can cause oscillation and

distortion.

Resonance Vel Sens (Resonance velocity sensitivity)

Use this parameter if you want velocity to influence the

Resonance parameter. If you want higher keyboard veloci-

ties to create more changes in Resonance, use positive (+)

values. For less Resonance change, use negative (-) values.

TVF Envelope display

This display is used for setting TVF envelope (how cutoff

frequency changes over time). The TVF envelope is dis-

played graphically.

Time1-4 (TVF envelope time 1–4)

Sets TVF envelope time (Time1–4). Higher settings will

extend the time over which cutoff frequency changes from

one point to the next point (for example, time during which

the cutoff frequency changes from Level 1 to Level 2 for

Time 2).

Level1-4 (TVF envelope level 1–4)

Sets the TVF envelope level (Level1–4) to determine cutoff

frequency of each point relative to the specified Cutoff

Frequency parameter value.

Envelope Depth (TVF envelope depth)

Adjusts TVF envelope amount. Higher settings result in

more change. Negative (-) settings invert the envelope.

Velocity Sens (TVF envelope velocity sensitivity)

The parameter to use when you want keyboard playing

dynamics (velocity) to affect TVF envelope amount. Positive

(+) settings increase TVF envelope amount as a key is

pressed harder. Negative (-) settings decrease TVF envelope

amount when the key is pressed harder.

Velocity Time (TVF envelope velocity time sensitivity)

The parameter to use when you want keyboard playing

dynamics (velocity) to affect the TVF envelope time. At posi-

tive (+) settings, higher keyboard velocities will reduce

(speed up) Time value. At negative (-) settings, higher key-

board velocities will increase (slow down) Time value.

Time 1 Time 2 Time 3 Time 4

Level 3

Level 1

Level 2 Level 4

key is released

Cutoff

Frequency

Time

key is pressed

Chapter 3. Creating your own sounds

[RHYTHM]

➞

[F3] (Key TVF)

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Roland XP-80 Owner's Manual Page 69

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Roland XP-80 Owner's Manual Page 69

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