Roland XP-80 Owner's Manual download pdf (Page 16)

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XP-80 configuration

Basic configuration

The XP-80 consists of a sound source, a sequencer and con-

trollers.

Sound source

The XP-80 sound source produces sound by responding to

commands in the form of MIDI messages received from its

controllers and sequencer. It will also produce sound by

responding to commands received from various external

devices it can be connected to.

Sequencer

The sequencer records various controller operations as MIDI

messages and transmits them to the sound source. MIDI

messages recorded on the sequencer can also be transmitted

from the MIDI OUT connector to allow the XP-80 to also

control external MIDI devices.

Controllers

Controllers include the keyboard, front panel sliders and

pedals which are connected to their respective rear panel

jacks. Adjusting these controllers enable you to produce or

modify sound.

Classification of XP-80 sound types

XP-80 sounds are made up of the following types:

Tones

In the XP-80, the Tone is the smallest class of sound. Each

Tone consists of one sound. But when you play the XP-80

you will mostly play a Patch, which is made up of several

Tones. Tones therefore are the elements which collectively

form a Patch.

Tone configuration:

WG (Wave Generator)

Using the Wave Generator, you select a waveform and set its

pitch.

TVF (Time Variant Filter)

With the Time Variant Filter, you modify the waveform’s

frequency characteristics.

TVA (Time Variant Amplifier)

With the Time Variant Amplifier, you set volume level and

set the sound’s position in a stereo soundfield.

Envelope

You use Envelope to initiate changes to occur to a sound

over time. There are separate Envelopes for the WG (pitch),

TVF (filter) and TVA (volume). For example, to modify a

sound’s attack and decay time, you would use TVA

Envelope to adjust volume changes to the sound over time.

LFO (Low Frequency Oscillator)

Use the LFO to create cyclic changes (modulation) in a

sound. The XP-80 has two LFOs. Either one or both can be

applied to effect the WG (pitch), TVF (filter) and/or TVA

(volume). To illustrate this control’s action, you can apply an

LFO to modify the WG (pitch) to create vibrato. If the LFO is

used to modify the TVA (volume), you’ll get tremolo.

Controller section (controllers such as

keyboard, pitch bend lever, etc.)

Sound source

section

Playback

Sequencer

section

Play

Recording

Pitch

Envelope

TVF

Envelope

TVA

Envelope

TVA

LFO 1 LFO 2

control signal

Tone

audio signal

Chapter 1. An overview of the XP-80

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Roland XP-80 Owner's Manual Page 16

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