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
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.
Environmental 48-pin LQFP and 56-pad QFN
package options
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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High performance HD Audio CODEC provides
Theater Quality Audio
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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
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High performance Σ∆ technology
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105dB DAC SNR
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System-level effects automatically disabled when
external connections made
90dB ADC SNR
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Five Stereo DACs and three stereo ADCs
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Dynamics Processing SKPI plug-in
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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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Enables improved voice articulation
Compressor/limiter allows higher average noise level
without resonances
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24-bit resolution with up to 192 KHz sample rates
Digital Microphone Interface
Dolby PC Entertainment Experience Logo Program
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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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Microphone Boost 0, 10, 20, 30, 40dB
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Dolby Technologies
Six adjustable Vref outputs for microphone bias
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Dolby HeadphoneTM, Dolby Virtual SpeakerTM
Dolby ProLogic IITM, Dolby ProLogic IIxTM
Dolby Digital LiveTM
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Integrated Headphone Amps (3)
S/PDIF In and Out
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Intel Audio StudioTM from Sonic Focus
ADAT® Optical “Lightpipe” Output
Support
Maxx PlayerTM from Waves
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Volume Up/Down Control
Microphone Beam Forming, Acoustic Echo
Cancellation, & Noise Suppression from
KnowlesTM
Jack Insertion Detect and Impedance Sensing
supports Jack Retasking and Universal Jacks
IDT™ 10-CHANNEL HIGH DEFINITION AUDIO CODEC
1
STAC9271/9272/9273/9274
V 0.82 100806
IDT CONFIDENTIAL