Roland XP-30 用户手册

Chapter 3. Creating Your Own Sounds

Chapter 3

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Modifying Pitch of a Rhythm

Tone (PITCH)

This group contains parameters that affect the pitch of the
Rhythm Tone for each key.

PITCH

Specify the basic pitch for the Rhythm Tone.

Coarse (Coarse Tune)

Select the key corresponding to the pitch at which you wish
to sound the Rhythm Tone.

Fine (Fine Tune)

Adjust the pitch in 1-cent steps (-50–+50 cents).

* One cent is 1/100th of a semitone.

Random (Random Pitch Depth)

If you want the pitch to change randomly each time you
press a key, specify the width of the change. If you do not
want random pitch change, set this parameter to 0. The value
is in units of 1 cent.

Env Depth (Pitch Envelope Depth)

Adjust the effect of the Pitch Envelope. Higher settings will result
in greater change. Negative (-) settings will invert the envelope.

PCH VELOCITY

Specify how key velocity will change the effect of the Pitch
Envelope.

Velocity Sens (Pitch Envelope Velocity Sensitivity)

Use this parameter if you want key velocity to change the
effect of the Pitch Envelope. Higher settings will result in a
greater difference between strongly and softly played notes.
Negative (-) settings will invert the change.

Velocity Time
(Pitch Envelope Time Velocity Sensitivity)

Use this parameter if you want key velocity to change the
overall time of the Pitch Envelope. Higher settings will result
in a greater time difference between strongly and softly
played notes. Negative (-) settings will invert the change.

PCH ENVELOPE

Make settings for the Pitch Envelope (changes in pitch over time).

fig.3-42.e

T1–4 (Pitch Envelope Time 1–4)

Specify the time over which the pitch will change from one
point to the next.

L1–4 (Pitch Envelope Level 1–4)

Specify the pitch change for each point relative to the basic
pitch.

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Changing the Tone (Filter) of a

Rhythm Tone (TVF)

The TVF (Time Variant Filter) uses a filter to modify the
frequency characteristics of the sound.

FILTER

Make TVF filter settings.

Type (Filter Type)

Select the filter type.

OFF:

filter not used.

LPF (Low Pass Filter):

Cut the frequencies above the
Cutoff Frequency. This is the most
common type of filter used in
synthesizers.

BPF (Band Pass Filter):

Pass only the frequencies in the
area of the Cutoff Frequency.

HPF (High Pass Filter):

Cut the frequencies below the
Cutoff Frequency.

PKG (Peaking Filter):

Emphasize the frequencies in the
area of the Cutoff Frequency.

Cutoff (Cutoff Frequency)

Set the basic frequency of the filter.

Resonance

Emphasize the frequencies in the area of the Cutoff
Frequency. For some settings, excessive levels can cause
oscillation and distortion.

fig.3-43.e

Env Depth (TVF Envelope Depth)

Adjust the depth of the TVF envelope. Higher settings will
result in greater change. Negative (-) values will invert the
envelope.

key is
released

Pitch

Time

key is
pressed

LPF

BPF

HPF

PKG

parameter value

Level

Cutoff frequency

Frequency

High

Low