doepfer
System A - 100
MCV 16
A-191
13
5.2 Indicators and controls
1
LEDs
The LEDs
1
give you a read-out of the frequency of
the Shepard generators. They show the state of the
sawtooth wave
at output
S0
and/or
triangle wave
at
output
T0
.
2
Freq. + •
3
Freq. –
Pressing buttons
2
or
3
raises
and/or
lowers
the
frequency
of the Shepard generator. These settings
are only temporary: if you want to
save
them, press
button
9
(see below).
4
Upper mode button
Button
4
selects the
Shepard mode
, which determi-
nes the direction of the sawtooth signal generated by
the Shepard generator (see table 3). The mode cho-
sen is indicated by LEDs
5
and
6
.
These settings are only temporary: if you want to
save
them, press button
9
(see below).
5
LED •
6
LED
LEDs
5
and
6
show the
Shepard mode
selected
(see table 3).
Table 3
: Shepard modes and LED indicators.
9
Reset / Store
Pressing button
9
saves
the settings for
frequency
and
Shepard mode
. Confirmation of the save proce-
dure is given by LEDs
5
,
6
and
8
lighting up for about
a second.
The instant the Shepard generator is reset, the sa-
wtooth and triangle waves at outputs
S0
and/or
T0
start at their
zero point
.
Mode
Effect
LED
5
LED
6
8 rising sawtooth waves
on
off
8 falling sawtooth waves
off
on
4 rising sawtooth waves at outputs
S0, S90, S180, S270;
4 falling sawtooth waves at out-
puts S45, S135, S225, S315
on
on
