DATASHEET
10-CHANNEL HIGH DEFINITION AUDIO CODEC
STAC9271/9272/9273/9274
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Digital PC Beep to all outputs
Description
+3.3 V to +5 V analog power supply options
Environmental 48-pin LQFP package
The STAC927x “Red River” is a family of Theater Quality
10-channel audio CODECs that enable systems with 7.1
audio playing simultaneously with VoIP or another stereo
audio stream. IDT's proprietary Σ∆ technology provides
high fidelity with an estimated DAC SNR up to 105dB. Up to
four digital microphones are supported enabling high
quality voice input for increased usability of voice
applications.
Software Support
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SKPI (Kernel Processing Interface)
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Enables plug-ins that can operate globally on all audio
streams of the system
Features
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12 band parametric equalizer SKPI plug-in
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Constant, system-level effects tuned to optimize a
particular platform can be combined with user-mode
“presets” tailored for specific acoustical environments
and applications
System-level effects automatically disabled when
external connections made
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High performance HD Audio CODEC provides
Theater Quality Audio
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High performance Σ∆ technology
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105dB DAC SNR
90dB ADC SNR
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Dynamics Processing SKPI plug-in
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Five Stereo DACs and three stereo ADCs
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Enables improved voice articulation
Compressor/limiter allows higher average noise level
without resonances
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Supports 7.1 Audio with simultaneous Real Time
Communication (RTC) channel such as VoIP or separate
stereo audio stream
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Dolby PC Entertainment Experience Logo Program
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24-bit resolution with up to 192 KHz sample rates
Digital Microphone Interface
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Dolby Master StudioTM (See Table)
Dolby Home TheaterTM (See Table)
Dolby Sound RoomTM (See Table)
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Direct interface up to four Digital Microphones
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Analog Stereo Microphone
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Dolby Technologies
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Microphone Boost 0, 10, 20, 30, 40dB
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Dolby HeadphoneTM, Dolby Virtual SpeakerTM
Dolby ProLogic IITM, Dolby ProLogic IIxTM
Dolby Digital LiveTM
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Six adjustable Vref outputs for microphone bias
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Integrated Headphone Amps (3)
S/PDIF In and Out
TM
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Intel Audio Studio from Sonic Focus
®
ADAT Optical “Lightpipe” Output
TM
Maxx Player from Waves
Support
Microphone Beam Forming, Acoustic Echo
Cancellation, & Noise Suppression from
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Volume Up/Down Control
Jack Insertion Detect and Impedance Sensing
supports Jack Retasking and Universal Jacks
TM
Knowles
IDT™ 10-CHANNEL HIGH DEFINITION AUDIO CODEC
1
STAC9271/9272/9273/9274 V 1.0 MARCH2007
IDT CONFIDENTIAL