adau1381 Analog Devices, Inc., adau1381 Datasheet - Page 41

• Manufacturer Part Number: adau1381
• Description: Low-noise Stereo Codec With Enhanced Recording And Playback Processing
• Manufacturer: Analog Devices, Inc.

SOUND ENGINE
SIGNAL PROCESSING
The ADAU1381 is designed to provide a fixed-function signal
processing flow specifically catered to digital still cameras and other
low power applications.
PROCESSING FLOW
The processing flow is outlined in Figure 52.
PROGRAMMING
Although the sound engine’s audio processing flow is fixed-
function, processing parameters and signal paths can be
modified by the user.
Real-time tuning and parameter generation is made possible by
SigmaStudio™, a graphical user interface that can communicate
with the ADAU1381 control port via the EVAL-ADUSB2EBZ
DIGITAL
INPUT
STEREO
LINE INPUT
STEREO
DIGITAL MIC
REDUCTION
NOISE
WIND
ADC
PLAYBACK
RECORD
ENHANCED
CAPTURE
STEREO
ADC
ROUTING
LOGIC
Figure 52. Sound Engine Signal Processing Flow
ADAU1381 SOUND ENGINE
Rev. A| Page 41 of 84
EQUALIZER
ROUTING
SIX-BAND
LOGIC
EQUALIZER
ROUTING
SIX BAND
LOGIC
EQUALIZER
ROUTING
SIX BAND
LOGIC
communications interface board (see the
for ordering information).
SigmaStudio is also capable of one-click generation of C-compatible
data and header files, which can then be integrated directly into
a system’s host processor.
PARAMETER MEMORY
The sound engine makes use of a parameter memory to store
signal processing parameter values, such as filter coefficients.
This memory space is mapped to addresses starting at 0x0000
and is accessible via the control port. The parameter memory
allows the user to modify signal processing parameters in real
time during operation of the sound engine.
PROCESSOR
DUAL-BAND
DYNAMIC
PROCESSOR
DUAL-BAND
DYNAMIC
PROCESSOR
DUAL-BAND
DYNAMIC
BEEP
DAC
RECORD
PLAYBACK
MIX
LINE OUTPUT
FLAG
STEREO
STEREO
STEREO
MUTE
MUTE
MONO
AD1940
DIGITAL
OUTPUT
ADAU1381
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