Roland XV-5080 Types of Patches and Their Composition, Four-Tone Patch, How a Tone Is Organized

Chapter 4 Creating Patches

Types of Patches and Their Composition

The basic unit of sound used in performances on the XV-5080 is called a Patch; there are two types of Patches, Four-Tone Patches and Multi-Partial Patches.

The Patch type is determined by the Tone type setting, in the Patch Common screen (p. 127).

You do not need to be particularly aware of such distinctions when playing Patches. However, when changing Patch settings or creating new Patches, the parameters used differ depending on the Patch type.

Four-Tone Patch

These correspond to the XV-5080’s Preset Patches and Wave Expansion Board Patches.

Each Four-Tone Patch can contain up to four Tones.

fig.04-001.e

			Tone
Tone	Tone	Tone
1	2	3	4

Example 1:A Patch consisting of only one Tone (Tones 2–4 are turned off).

Tone	Tone	Tone	Tone
1	2	3	4

Example 2: A Patch consisting of four Tones.

You can turn the Tones in a Patch on or off. Only Tones that are turned on are heard when you play the Patch. (p. 126) You can also specify how Tones 1 and 2 and Tones 3 and 4 will be combined (Structure). (p. 131)

How a Tone Is Organized

In the XV-5080, the Tone is the smallest class of sound. However, it is not possible to play a Tone by itself. The Patch is the unit of sound that can be played, and Tones are the basic building blocks used to form a Patch. A Tone consists of the following five components.

fig.04-002.e
Tone	LFO 1	LFO 2
WG	TVF	TVA
Pitch	TVF	TVA
Envelope	Envelope	Envelope

audio signal control signal

WG (Wave Generator)

Provides for the selection of PCM waveforms (waves), which form the basis of the sound, and provides settings that determine how the pitch of the sound will change.

The XV-5080 offers 1083 different waveforms. (See Waveform List p. 277.) Two waveforms can be assigned to each Tone. (These can be assigned as a stereo pair, with one waveform assigned to the left, and one to the right.)

All Patches onboard the XV-5080 consist of combinations of Tones, which in turn are composed of these waveforms. You can use the force with which keys are played, or MIDI messages to control the way each Tone is played. This is referred to as the Tone Mix Table (TMT).

Additionally, you can load Wave data (samples) into the XV- 5080 from sampler libraries and assign this data to the Tones.

TVF (Time Variant Filter)

Specifies how the constituent frequencies of the Tone will change.

TVA (Time Variant Amplifier)

Specifies how the volume will change, and controls the localization.

Envelope

An envelope applies changes to the Tone over time. There are separate envelopes for Pitch, TVF (filter), and TVA (volume). For example, you would use the TVA Envelope to modify the way in which the Tone attacks and decays.

LFO (Low Frequency Oscillator)

Use the LFO to create cyclical changes—or cyclical

“modulation”—in a Tone. Each Tone has two LFOs. An LFO can be applied to the Tone’s pitch settings, TVF (filter), and TVA (volume). When an LFO is applied to pitch, a vibrato effect is produced. When an LFO is applied to the TVF cutoff frequency, a wah-wah effect is produced. When an LFO is applied to the TVA volume, a tremolo effect is produced.

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