Moog MEMORYMOOG 345 Owner's And Service Manual page 38

Other terms for CONTOUR GENERATOR are ENVELOPE GENERATOR, or ADSR, short for
Attack, Decay, Sustain and Release — the four stages of the CONTOUR GENERATOR. As you can see
from the above diagram, the attack time is the time it takes for the CONTOUR to reach its peak once a
trigger signal has been received. From there the decay stage begins. Decay is the time it takes for the =
peak of the attack to subside to the sustain level — the level the CONTOUR maintains until the key is C)
released. When you let up on a key, or release it, the CONTOUR goes into its release state which,
depending on how the release time is set, can cause the note to ring out or cut off abruptly.
There are two ADSR CONTOUR GENERATORS in each voice of the Memorymoog. The filter
contour output is applied to the CUTOFF of the FILTER. The second's output is applied to the VOL-
TAGE-CONTROLLED AMPLIFIER. Both ADSRs have the same characteristics: attack time is variable
from 1 millisecond to 10 seconds; decay time is variable from 2 milliseconds to 20 seconds; sustain
level is continuously variable from 0 to 10; and the release time is variable from 2 milliseconds to
20 seconds.
It's important to note that the RELEASE SWITCH (10.4) has to be on in order for the release
portion of the CONTOUR to function. The RELEASE FOOTSWITCH (15.1) serves as a remote on/
off control for the RELEASE SWITCH. It functions in the same way that a piano's sustain pedal works—
down, the release is on; up, the release is off. However if the program is set up with the release on, the
first time the pedal is depressed, the RELEASE will be turned off; from that point the footswitch will
operate as described above. Try this patch: switch the RELEASE on and off and note the change in the
sound when a key is released.
RELEASE TIME
OSCILLATORS VOLTAGE CONTROLLED FILTER
KB TRACK
2 8 2 8
yp Pe
i
3 2/3
é \ /*
PULSE WIDTH (%)} o 10 o 4 O
CUTOFF EMPHASIS CONTOUR AMOUNT
'
a
s WAVESHAPE
00 1 as
jae
s
5
1 2 3
SNS Al/ ao.\ 1/3 so \| /.6 AIL a0 \1/7 6
nse aheees, 2 = 100 6 200 2 2 8 200
sy Ws "ys we Yrs 077 ee 7 . 20~/ \ 18
0 ne] IMSEC 10SEC 2MSEC 20SEC 0 10 2MSEC 20SEC
ATTACK DECAY SUSTAIN RELEASE
FREQUENCY PULSE WIDTH (%)
RETURN UNCONDITIONAL KEYBOARD RELEASE
TOZERO CONTOUR FOLLOW
e e @ e \I/ sel
™
BOOO2 «32
2 7
FREQUENCY PULSE WIDTH (%}
700 1 45 147 3 5
wILs m\ILe IL
100 6 200 202 8
0" Yee 207 ee eae .
tMSEC 10SEC 2MSEC 20SEC
ATTACK DECAY
VOLTAGE CONTROLLED ¢/MPLIFIER
HIT A NOTE. LISTEN TO WHAT HAPPENS WHEN YOU TURN THE
RELEASE SWITCH ON AND OFF AS YOU LET UP ON THE KEY.
34