Yamaha CS2x Owner's Manual page 17

How The CS2x Generates Sound
The diagram and accompanying information below explains the CS2x's tone generation architecture and the key components which
go into making up an AWM2 voice, as well as the types of controls and parameters which you can apply to the voice.
2
OSCILLATORS
ATTACK LEVEL
( ATK LEVEL )
LEVEL
PITCH
INITIAL LEVEL
ATTACK TIME DECAY TIME
( INIT LEVEL )
( ATK TIME ) ( DCY TIME )
KEY ON
1 AWM2 Waveform The fundamental source of
the CS2x's sound is the sampled AWM2
waveform. There are hundreds preprogrammed
in ROM which are used by the Performances.
2 AWM2 VOICE The AWM2 waveform
combines with the oscillator, filter and amplifier
to make up a CS2x voice.
PEG The Pitch Envelope Generator controls
how the pitch changes over time.
INIT LEVEL (Initial Level) sets the initial pitch
level when a key is played.
ATK TIME (Attack Time) determines the time
required for a sound to reach its Attack Level
after a note is played.
ATK LEVEL (Attack Level) sets the initially
targeted level after a note is played.
DCY TIME (Decay Time) determines the time
required for a sound to reach its basic pitch
from the Attack Level while the key is held.
REL TIME (Release Time) determines the time
it takes for the basic pitch to reach the
Release Level after the key has been
released.
REL LEVEL (Release Level) sets the final
targeted level after the key is released.
FEG The Filter Envelope Generator controls
how the timbre changes over time.
ATK TIME (Attack Time) determines the time
required for a sound to reach its maximum
cutoff frequency level when a note is played.
DCY TIME (Decay Time) determines the time
required for a sound to reach its Sustain
Level from the maximum level while the key
is held.
1
AWM2 WAVEFORM
AWM2 VOICE
FILTERS
LEVEL
BASIC KEY
PLAYED
CUT OFF
TIME
FREQUENCY
ATTACK TIME DECAY TIME
RELEASE TIME RELEASE LEVEL
( ATK TIME ) ( DCY TIME )
( REL TIME ) ( REL LEVEL )
KEY ON
KEY OFF
3
SUS LEVEL (Sustain Level) sets the Sustain
Level; the cutoff frequency will be
maintained at this level for as long as the
key is held.
REL TIME (Release Time) determines the
time it takes for the cutoff frequency to
reach the level preset for each voice after
the key has been released.
AEG The Amplitude Envelope Generator
controls how the volume changes over time.
ATK TIME (Attack Time) determines the time
required for a sound to reach its maximum
volume level when a note is played.
DCY TIME (Decay Time) determines the
time required for a sound to reach its
Sustain Level from the maximum volume
level while the key is held.
SUS LEVEL (Sustain Level) sets the Sustain
Level; the volume will be maintained at this
level for as long as the key is held.
REL TIME (Release Time) determines the
time it takes for a sound to sustain after the
key has been released.
3 LFO The Low Frequency Oscillator generates
low frequency signals which can be used to
modulate the PEG, FEG and AEG.
PMOD The
Modulation to the PEG to create vibrato
effects.
FMOD The LFO can apply Filter Modulation
to the FEG to create wah-wah types of
effects.
LEVEL
SUSTAIN LEVEL
(SUS LEVEL)
TIME VOLUME
RELEASE TIME
ATTACK TIME
( REL TIME )
( ATK TIME )
KEY ON
KEY OFF
LFO
LFO can apply Pitch
17
5
AMPLIFIERS EFFECTS
SUSTAIN LEVEL
( SUS LEVEL )
TIME
DECAY TIME RELEASE TIME
( DCY TIME ) ( REl TIME )
KEY OFF
4
CONTROLLER
AMOD The LFO can apply Amplitude
Modulation to the AEG to create tremolo
effects.
4 CONTROLLER You can use several types of
controllers to manipulate various parameters in
realtime.
MW Use the Modulation Wheel to control
PMOD, FMOD, and Filter Cutoff.
FC Use the Foot Controller to control
FMOD, Filter Cutoff, and Variation Effect.
SOUND CONTROL KNOBS The eight
sound SOUND CONTROL knobs let you
control AEG Attack, Decay and Release
Times, HPF and LPF Cutoffs, LPF Resonance,
and more (page 19). The ASSIGN 1/DATA
and ASSIGN 2 knobs can be specified to
control one of many types of available
parameters (see the lists on pages 47 and
65).
5 EFFECTS Available effects which can be
applied to a voice depend on whether the CS2x
is in Performance mode or Multi Play mode.