Amplitude Eg; [F4] Eg; Ampeg - Yamaha A4000 Owner's Manual

4. EG
The EG function sets up the sample's envelope generators
(EGs). The envelope generators determine how sound devel-
ops over time, both while the note is held and after it is
released. The A5000/A4000 offers three different EGs: an
amplitude EG, a filter EG, and a pitch EG.
• The [COMMAND/EXIT] button gives you rapid access to a number
of helpful commands while you are working with this function. For
example, you can use the [COMMAND/EXIT] button when you
want to save your edit results to disk, or when you want to cancel
your new changes and restore the previously saved data.
Press the [EDIT] button and then the [F4] Button to go to the
EG functions.
3 display pages are provided: AmpEG (Amplitude EG), Fil-
terEG (page 138), and PitchEG (page 140).
• See the "Basic Operation" section on page 78 for details on switch-
ing between display pages.

Amplitude EG

[EDIT] Button [F4] Button
"EDIT-AmpEG"
This page sets up the AEG (amplitude envelope generator).
The AEG determines how the sound level (amplitude) devel-
ops over time. Development begins at Note On, and termi-
nates when the sound dies out. The envelope is defined by
four settings, as illustrated below.
q
Cursor (Amplitude EG Rate/Level)
Cursor
q
Knob 1 Knob 2
Turn AEG Attack
Cursor/Page
action Rate
Press
Tree View QUICK...
action
Level
Maximum Level
AEG Sustain Level
AEG Attack AEG
Rate Decay Rate
Note On
Chapter 5 EDIT Mode
Knob 1 to select
Knob 3 Knob 4 Knob 5
AEG Decay AEG Sustain AEG Release
Rate Level Rate
QUICK... QUICK... QUICK...
Time
AEG
Release Rate
Note Off
Knob 1
[ Turn] Cursor Position/Page Selection
Positions the cursor and selects display pages.
[ Press] Tree View
Calls the Tree View display (page 83).
Knob 2
[ Turn] AEG Attack Rate
Determines the rate at which the sound reaches maxi-
mum level from the initial Level 0 (note-on). The higher
the value, the faster the attack.
[Range] 0 — 127
• If the AEG Attack Mode (Cursor
"hold," this parameter determines the length the max-
imum level is held (actually the inverse of the value
— the higher the value the shorter the hold time,
page 138).
[ Press] QUICK...
Calls the quick entry menu (page 83).
Knob 3
[ Turn] AEG Decay Rate
This value sets the decay rate: the rate at which the
sound drops from its maximum amplitude to its "sustain"
level. Higher values produce faster decay.
[Range] 0 — 127
• Note that this setting is meaningless (there is no
decay period) if the AEG Sustain Level (Knob 4) is
set to 127.
[ Press] QUICK...
Calls the quick entry menu (page 83).
Knob 4
[ Turn] AEG Sustain Level
This value sets the sustain level. The sustain level is the
steady level that begins when decay is completed, and
continues until Note Off occurs.
[Range] 0 — 127
[ Press] QUICK...
Calls the quick entry menu (page 83).
Knob 5
[ Turn] AEG Release Rate
This value sets the release rate: the rate at which the
amplitude drops from the sustain level to zero following
Note Off. Higher values produce faster release. A setting
of 127 causes sound to stop immediately when Note Off
occurs.
[Range] 0 — 127
[ Press] QUICK...
Calls the quick entry menu (page 83).
A5000/A4000 •
EDIT-EG
w
, Knob 4) is set to
137
Chapter 5 EDIT Mode