Yamaha MOTIF XF Reference Manual page 10

Tone Generator Block
normally (with the XA Control parameter settings "normal"
and "legato").
Authentic note release sound
Conventional synthesizers are not good at realizing the
sound produced when the note of the acoustic instrument
is released. The MOTIF XF realizes the sound produced
when the note of the acoustic instrument is released, by
setting the XA Control parameter of a certain Element to
"key off sound."
Subtle sound variations for each note played
Conventional synthesizers attempt to reproduce this by
randomly changing the pitch and/or filter. However, this
produces an electronic effect and is different from the real
sound changes on an acoustic instrument. The MOTIF XF
more accurately reproduces these subtle sound variations
by using the XA Control parameter settings, "wave cycle"
and "wave random."
Switching among different sounds to recreate
the natural performance on an acoustic
instrument
Acoustic instruments have their own unique
characteristics—even specific, unique sounds that are
produced only at certain times in a performance. These
include the flutter tonguing on a flute or playing high
harmonics on an acoustic guitar. The MOTIF XF recreates
these by allowing you to switch between the sounds while
you play—using the ASSIGNABLE FUNCTION buttons and
the XA Control parameter settings, "AF 1 on," "AF 2 on"
and "all AF off."
New sounds and new styles of playing
The highly versatile functions above can be applied
effectively not only to acoustic sounds but also to
synthesizer and electronic Voices as well. The XA feature
opens up enormous potential for realizing authentic
sounds, performing expressively and coming up with
creative new styles of playing.
To create sounds such as those described above using
Expanded Articulation, refer to page 70.
Elements and Drum Keys
Elements and Drum Keys are the smallest "building blocks"
in the MOTIF XF that comprise a Voice; in fact, only one
Element or one Drum Key could be used to create a Voice.
These small sound units can be built, enhanced and
processed by a variety of traditional synthesizer
parameters, such as Oscillator, Pitch Filter, Amplitude, and
LFO (shown below).
10
MOTIF XF Reference Manual
OSC LFO
(Oscillator)
Low Frequency
Oscillator
Waveform
(AWM2)
PITCH
FILTER
Controls the
Changes the
pitch of the
tonal quality of
sound.
the sound
output from the
PITCH unit.
Pitch EG Filter EG
(Pitch (Filter
Envelope Envelope
Generator) Generator)
Oscillator
This unit outputs the wave which determines the basic
pitch. You can assign the waveform (or basic sound
material) to each Element of a Normal Voice or each Key of
a Drum Voice. In the case of a Normal Voice, you can set
the note range for the 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). In addition, the XA related
parameters can be set in this unit.
Oscillator related parameters can be set in the Oscillator
display (pages 69 and 87).
Pitch
This unit controls the pitch of the sound (wave) output from
the Oscillator. In the case of a 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.
Pitch related parameters can be set in the Pitch display
(page 71) and Pitch EG display (page 72) of the Voice Edit
mode. Note that Pitch related parameters of a Drum Voice
can be set in the Oscillator display.
Filter
This unit modifies the tone of the sound output from Pitch
by cutting the output of a specific frequency portion of the
sound. Also, by setting the FEG (Filter Envelope
Generator), you can control how the Cutoff Frequency of
the Filter changes over time.
Filter related parameters can be set in the Filter display
(pages 74 and 89), Filter EG display (page 76) and Filter
Scale display (page 78) of the Voice Edit mode.
Amplitude
This unit controls the output level (amplitude) of the sound
output from the Filter block. The signals are then sent at
this level to the Effect block. Also, by setting the AEG
(Amplitude Envelope Generator), you can control how the
volume changes over time.
AMP
Controls the out-
put level (ampli-
tude) of the sound
output from the
FILTER unit. The
signals are then
sent at this level to
the Effect block.
Amplitude EG
(Amplitude
Envelope
Generator)