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SEP.10 1978
4.
Key
Trigger Detector, Envelope Generator ARH-1
The key trigger detector detects change
in
key
bus current, and
it
generates pulses
by the key on-off operation and trigger pulses by the
key
on operation.
The envelope generator
is
triggered by
the gate pulse, or
by the trigger pulse when
the second touch switch is activated,
5.
Ensemble Modulator ETH-7
IC's
(2AI)512D)
are used in the 4 sets of aoudio
delay
lines. The
clock frequency
range
is
40KHz
to 250KHz.
To got various output signals, the
processing conditions are different for each
of
the
delay
lines: the
clock generators are modulated by four different
waves,
that
is,
two
different triangular waves and two different waves
of
anti-phase triangular
wave
plus sine wave.
INPUT
O-
LFO
1
L
FO
3
L
F0
4
CLOCK OSC
1
CLOCK OSC
2
CLOCK OSC
3
DELAY
LINE
1
L
P F
OUTPUT
1
DELAY
LINE 2
ZZJ
—
L
P F
DELAY
LINE
3
OUTPUT
2
CLOCK OSC
4
DELAY
LINE
4
PCB LOCATIONS &
INTERWIRING
RS'505
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