ADDAC System ADDAC220 Bedienungsanleitung
ADDAC System
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ADDAC220
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April.2025
USER’S GUIDE . REV01
ADDAC220
DUAL
ENVELOPE
FOLLOWER+
INTRODUCING
From Portugal with Love!
Instruments for Sonic Expression
Est.2009
ADDAC220
DUAL ENVELOPE FOLLOWER+ USER’S GUIDE
April.2025Revision.01
Welcome to:
page 2ADDAC SYSTEM
WELCOME
This is our new Stereo Envelope Follower, an analog/digital hybrid for
better dynamic range analysis.
The incoming audio signal gain can be set with the control, the [GAIN]
signal is then fully rectified and passed through an analog envelope
follower with a fixed short attack and decay.
This analog signal is then sent into a 12bit ADC (analog to digital
converter) of an MCU (microcontroller unit) from here on the signal is
processed digitally. Whenever the ADC detects clipping the led [CLIP]
will turn On.
The digitized signal is then passed through a Savitsky-Golay filter for
noise reduction smoothing the incoming signal.
Next the signal is slewed using the [ATTACK] [DECAY] and controls.
The MCU keeps a history of the last sampling points and detects the
minimum and maximum values of the signal which reflect the current
dynamic range and maps the signal minimum and maximum amplitude
to 0V and the maximum voltage detected. Avoiding the discharge of the
analog envelope capacitor.
This new mapped signal is then processed via the [RESPONSE CURVE]
control balacing the response like one would with a standard AD
envelope with LOG/EXP control.
The [ENV. GAIN] attenuverter control goes up to p2-x2 amplification and
sets the attenuation / amplification factor of the output range, the red
led monitors this level. The led uses pwm control for faster response and
better visualization of the output signal across the full output range.
Finally the allows to displace the signal’s voltage up or down.[OFFSET]
The control sets the level to compare to the output signal [THRESHOLD]
and turns the [GATE] output On when the signal is above the threshold.
The [GATE LED] show the output state.
The carries the Envelope signal (0 to +10V) while the [INV. CV] [CV OUT]
output carries an inversion of the signal (-10V to 0v).
The [AVG. OUT] outputs the average of both Left and Right CVs (0 to
+10V) while the [INV. AVG.] outputs the inverted average signal (-10V to
0v).
The switch allows to use the left channel [STEREO / DUAL MONO]
controls to operate the right channel for stereo operation or keep them
independent in dual mono.
In Stereo mode only the Right channel gain will be independent.
Left input is normalled to the Right input.
Tech Specs:
10HP
4.5cm deep
70mA +12V
40mA -12V
LEFT CHANNEL RIGHT CHANNEL
ADDAC220 User’s Guide
page 3ADDAC SYSTEM
SIGNAL FLOW DIAGRAM
+5v
-5v
0v
AUDIO INPUT POST GAIN
FULL RECTIFICATION
ANALOG ENVELOPE OUTPUT
ADC CAPTURE
CLIP
LED
ADC INPUT RANGE
+5v
Minimum detected
Maximum detected
DYNAMIC RANGE
0v
ADC ENVELOPE INPUT
MAPPED ENVELOPE OUTPUT
+5v
0v
LOGARITHMIC
LINEAR
EXPONENTIAL
+10v
VIRTUAL ENVELOPE
GAIN CONTROL
0v
+5v
VIRTUAL ENVELOPE
OFFSET CONTROL
GATE THRESHOLD
-10v
-5v
+10v
0v
+5v
THRESH
GATE
OUT
INPUT GAIN
FULL RECTIFICATION
ENVELOPE FOLLOWER
12BIT ADC
(ANALOG TO DIGITAL CONVERTER)
16BIT DAC
(DIGITAL TO ANALOG CONVERTER)
SAVITSKY-GOLAY FILTER
(FOR SIGNAL NOISE REDUCTION)
CURVE RESPONSE
ENVELOPE GAIN
(x2 ATTENUVERTER)
ENVELOPE OFFSET
DYNAMIC RANGE
DETECTION & MAPPING
AUDIO INPUT
ATTACK / DECAY
CV OUTPUT
GATE THRESHOLD
PWM CONTROLLED
LED OUTPUT MONITOR
CLIPPING LED MONITOR
GATE LED
GATE OUTPUT
INVERTED CV OUTPUT
ANALOGANALOG DIGITAL
OUTPUT
INVERTED OUTPUT
+5v
-5v
0v
Produktspezifikationen
| Marke: | ADDAC System |
| Kategorie: | Nicht kategorisiert |
| Modell: | ADDAC220 |
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