PRODUCT BRIEF
THEATER QUALITY TEN CHANNEL HIGH
DEFINITION AUDIO CODEC WITH DIGITAL
MICROPHONE INTERFACE
STAC927x Red River
+3.3 V to +5 V analog power supply options (See
DESCRIPTION
Table)
The STAC927x “Red River” is a family of Theater Quality 10-
channel audio CODECs that enable systems with 7.1 audio play-
ing simultaneously with VoIP or another stereo audio stream.
IDT's proprietary Σ∆ technology provides high fidelity with an esti-
mated DAC SNR up to 105dB. Up to four digital microphones are
supported enabling high quality voice input for increased usability
of voice applications.
Environmental 48-pin LQFP package
SOFTWARE SUPPORT
Kernel Processing Interface (SKPI)
Enables plug-ins that can operate globally on all audio
streams of the system
FEATURES
12 band parametric equalizer SKPI plug-in
Constant, system-level effects tuned to optimize a
particular platform can be combined with user-mode
“presets” tailored for specific acoustical environments
and applications
High performance HD Audio CODEC provides
Theater Quality Audio
High Fidelity Σ∆ technology
105dB DAC SNR (See Table)
90dB ADC SNR
System-level effects automatically disabled when
external audio connections made
Dynamics Processing SKPI plug-in
Five stereo DACs and three stereo ADCs
Enables improved voice articulation
Supports 7.1 Audio with simultaneous Real Time
Communication (RTC) channel such as VoIP or separate
stereo audio stream
Compressor/limiter allows higher average noise level
without resonances
24-bit resolution with up to 192 kHz sample rates
Digital Microphone Interface
Dolby PC Entertainment Experience Logo Program
Dolby Master StudioTM (See Table)
Dolby Home TheaterTM (See Table)
Dolby Sound RoomTM (See Table)
Direct interface up to four Digital Microphones
Analog Stereo Microphone
Microphone Boost 0, 10, 20, 30, 40dB
Six adjustable Vref outputs for microphone bias
Dolby Technologies
Dolby HeadphoneTM, Dolby Virtual SpeakerTM
Dolby ProLogic IITM, Dolby ProLogic IIxTM
Integrated Headphone Amps (3)
SPDIF In and Out
Dolby Digital LiveTM
TM
®
ADAT Optical “Lightpipe” Output (See Table)
Intel Audio Studio
Maxx Player from Waves
from Sonic Focus
Volume Up/Down Control
TM
Jack Insertion Detect and Impedance Sensing
Microphone Beam Forming, Acoustic Echo
TM
Supports Jack Retasking and Universal Jacks
Cancellation, & Noise Suppression from
Digital PC Beep to all outputs
TM
Knowles
TM
TM
WOW and Tru Surround from SRS
IDT™
1
STAC927X RED RIVER
V1.0 03/07
THEATER QUALITY TEN CHANNEL HIGH DEFINITION AUDIO CODEC WITH DIGITAL MICROPHONE INTERFACE