Yamaha MOTIF ES Owner's Manual page 160

Internal Structure (System Overview)
Normal Voices & Drum Voices
Internally, there are two Voice Types: Normal Voices and Drum
Voices. Normal Voices are mainly pitched musical instrument-
type sounds that can be played over the range of the
keyboard. Drum Voices are mainly percussion/drum sounds
that are assigned to individual notes on the keyboard. A
collection of assigned percussion/drum waves or Normal
Voices is known as a Drum Kit.
Normal Voice
Waveform (Preset 1-1859, User 1-1024)
Velocity
Element 1
Drum Voice
C0
Individual drum
sounds (different
for each key)
Key 1 Key 5
GM Voices
GM (General MIDI) is a worldwide standard for Voice
organization and MIDI functions of synthesizers and tone
generators. It was designed primarily to ensure that any song
data created with a specific GM device would sound virtually
the same on any other GM device – no matter the
manufacturer or the model. The GM Voice bank on this
synthesizer is designed to appropriately play back GM song
data. However, keep in mind that the sound may not be
exactly the same as played by the original tone generator.
Tone generator parameters that produce the Voice sound
Among various parameters that makes up one Voice,
Oscillator, Pitch, Filter, Amplitude, LFO and three Envelope
Generators (PEG, FEG, AEG) shown in the illustration on
pages 160-162 are the basic parameters for creating the Voice
sound. Parameters about Oscillator, Pitch, Filter and Amplitude
determine the three basic elements of the sound – Pitch (how
low or high it is), Tone (or its overall sound quality), and Volume
(how loud its volume level is) of the Voice. Parameters such as
LFO and EG (Envelope Generator) determine the transition in
these three basic elements of the sound from the moment the
sound starts to the moment the sound stops.
In the sections that follow, we'll explain in detail about the
sound-related parameters and provide an introduction to the
basics of electronic synthesis.
160
Owner's Manual
Element 3
Element 2
One Voice
Element 4
C1
Key 10 Key 18 Key 21 Key 73
Oscillator
VOICE] Voice selection
Drum Key selection
This unit outputs the wave which determines the basic pitch.
You can assign the wave (or basic sound material) to each
Element of the Normal Voice or each Key of the Drum Voice.
In the case of the Normal Voice, you can set the note range
for Element (the range of notes on the keyboard over which
the Element will sound) as well as the velocity response (the
range of note velocities within which the Element will sound).
For example, you could set one Element to sound in an upper
range of the keyboard, and another Element to sound in a
lower range. Thus, even within the same Voice, you can have
two different sounds for different areas of the keyboard or you
can make the two Element ranges overlap so that their
sounds are layered over a set range. Furthermore, you can
set each Element to respond to different velocity ranges so
that one Element sounds for lower note velocities, whereas
another Element sounds for higher note velocities. See the
illustration at left of this page.
n
You can assign the wave with the following operation.
[VOICE] Voice selection
selection [F1] OSC
Strictly speaking, what is assigned here to an Element or Key is not a
"wave" but a "waveform." The difference between the two terms is
explained on page 173.
Pitch
C6
[VOICE] Voice selection
Drum Key selection
This unit controls the pitch of the sound (wave) output from
the Oscillator. In the case of the Normal Voice, you can
detune separate Elements, apply Pitch Scaling and so on.
Also, by setting the PEG (Pitch Envelope Generator), you can
control how the pitch changes over time.
PEG (Pitch Envelope Generator)
Using the PEG, you can control the transition in pitch from the
moment the sound starts the moment the sound stops. You
can create the PEG by setting parameters as illustrated
below. When you press a note on the keyboard, the pitch of
the Voice will change according to these envelope settings.
This is useful for creating automatic changes in pitch, which is
effective for the Synth Brass. Furthermore, different PEG
parameters can be set for each Element or each Key.
Attack
Level
Pitch
Hold
Level
0
Hold
Attack
Time Time
Pressing the key (Key on)
[EDIT] Element selection/
[F1] OSC
[EDIT] Element selection/Drum Key
[SF1] WAVE
[EDIT] Element selection/
[F2] PITCH
Decay1
Level
Sustain Level
(Decay2 Level)
Release
Decay1 Decay2
Time
Time Time
Releasing the key (Key off)
Release
Level
Time