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Sub Oscillator for Solo Keyboard
Oscillator for Ring Modulator
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Digital Analogue Convertor
0.0047
1
Key Voltage Delay
ckt for Portamento
12P
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Digital Signal
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(6, 46)PR3
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5.D1~9
'Diode 1$2473(VE)
'ortamento
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6. Variable Resistor
: 3321H
7. Amark
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Buffer for Delayed
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Digital Signal
(1 or O) from SK
mple hold and Gate
(4, 44)PR1
are formed by this ckt,
(10, 50)KEY
(11, 51)PKC
To avoid a change of pitch during the sustain time following
the release of the portamento keyboard, sample hold is per-
formed
on the key voltage.
KEC-3257-43
—41
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