Date: January 3, 1996 Sheet of 1
Size Document Number REV
C DYNBLOCK.SCH B
Title
DYNAMICS PROCESSOR ANALOG BLOCK DIAGRAM
PHONE (415) 855-0400 FAX (415) 855-0410
220 PORTAGE AVE. PALO ALTO, CA 94306
EUPHONIX
OUTPUT
BYPASS
1 2
3
ES108A AUDIO BLOCK DIAGRAM (SINGLE CHANNEL)
MAIN INPUT
CHAN N
UNBAL OUT
1 2
3
0dB
-6/0/+6/+12dB
GAIN SWITCH
A
MAIN
SIDECHAIN
VCA SOURCE
VCA
TEMP.
COMP.
+
IN
OUT
DYNAMIC EQ FUNCTION
(see note *)
B
SOFT
CLIP
CIRCUIT
ON
OFF
KEY LISTEN
0dB
EFFECT
IN
SIDECHAIN
MAIN SIGNAL PATH
CONTROL
VOLTAGE
LINK
OFFON
TO MAIN INPUT BUS
CV LINK OUTPUT
MAIN INPUT BUS
______________
CV LINK INPUT
CONTROL
VOLTAGE
OFFSET
DAC
(12-BIT)
+
FAST GATE ATTACKS
WHEN SWITCH OPENS
CAL CAL
FAST
GATE SPEED
FAST GATE
THRESHOLD
DETECTOR
ABS
VALUE
OUT
C
MAIN
KEY
-6/0/+6/+12dB
GAIN SWITCH
CHAN 1
CHAN 2
CHAN 3
CHAN 4
CHAN 5
CHAN 6
CHAN 7
CHAN 8
MAIN INPUT
SELECTOR
DET LINK INPUT
1 2
3
0dB
EXTERNAL KEY INPUT
FILTER #1
FILTER #2
FILTERS ARE SELECTABLE BAND-PASS,
NOTCH, OR LOW-PASS, HIGH-PASS,
ALLPASS-INVERT.
TAKE
MAX
IN
FILTERS
MUX
16-BIT
ADC
DSP
DYNAMIC
CONTROL
VOLTAGE DACS
(16-BIT)
CONTROL VOLTAGE
FOR GATE ONLY
CONTROL VOLTAGE
FOR COMP/LIM/EXP
*
subtracting a variable amount of filtered
input signal from the main (unfiltered)
input signal. In this mode, the main input
signal is routed through the sidechain
filters (which also invert the signal)
The Dynamic EQ function is implemented by
and then to the VCA. Gain reduction, achieved
by partial signal cancellation, occurs only
METER
SELECT
A
B
C
ON
OFF
DETECTOR LINK
DET LINK OUTPUT
DC REF INPUT
LPF
REFERENCE
VOLTAGE
GENERATOR
at frequencies in the filter's pass band;
and since the DSP sees only the filtered
signal, the amount of gain reduction is
based on how much signal energy is within
the filter's pass band.
CONTROL
SOURCE
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