Creating A Patch; How A Patch Is Organized - Roland XV-2020 Owner's Manual

Creating a Patch

How a Patch Is Organized

The type of sound most commonly played on the XV-2020 is called a Patch. Each Patch can contain up to
four Tones.
fig.1-01.e
Tone Tone
1
Example 1:A Patch consisting of only one Tone
(Tones 2–4 are turned off).
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. 45)
You can also set the structure of a Patch to specify how Tones 1 and 2 and Tones 3 and 4 are combined. (p.
48)
How a Tone Is Organized
Tones are the smallest programmable unit of sound on the XV-2020, and are the basic building blocks that
make up a Patch. You can't play a Tone by itself—it can only be played as part of a Patch or Rhythm Set.
A Tone consists of the following five components.
fig.1-02.e
Tone
WG
Pitch
Envelope
audio signal
WG (Wave Generator)
This selects the PCM waveform material that provides the basis of the Tone. Two waveforms can be
assigned to each Tone.
The XV-2020 has 1083 different waveforms. (See Waveform List p. 121.)
All Patches built into the XV-2020 consist of combinations of Tones based on these waveforms.
TVF (Time Variant Filter)
This specifies how the frequency components of the Tone change.
TVA (Time Variant Amplifier)
This determines how the volume and panning of the Tone change.
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.
44
Tone Tone
2 3 4
LFO 1
TVF
TVF
Envelope
control signal
Tone Tone Tone
1 2 3
Example 2: A Patch consisting of four Tones.
LFO 2
TVA
TVA
Envelope
Tone
4