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10-CHANNEL HIGH DEFINITION AUDIO CODEC Description
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.
STAC9271/9272/9273/9274
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Digital PC Beep to all outputs +3.3 V to +5 V analog power supply options Environmental 48-pin LQFP package
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 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 Enables improved voice articulation Compressor/limiter allows higher average noise level without resonances Dolby Master StudioTM (See Table) Dolby Home TheaterTM (See Table) Dolby Sound RoomTM (See Table) Dolby HeadphoneTM, Dolby Virtual SpeakerTM Dolby ProLogic IITM, Dolby ProLogic IIxTM Dolby Digital LiveTM
Features
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High performance HD Audio CODEC provides Theater Quality Audio High performance Σ∆ technology
12 band parametric equalizer SKPI plug-in
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105dB DAC SNR 90dB ADC SNR Supports 7.1 Audio with simultaneous Real Time Communication (RTC) channel such as VoIP or separate stereo audio stream
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Five Stereo DACs and three stereo ADCs
Dynamics Processing SKPI plug-in
24-bit resolution with up to 192 KHz sample rates Digital Microphone Interface
Dolby PC Entertainment Experience Logo Program
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Direct interface up to four Digital Microphones Microphone Boost 0, 10, 20, 30, 40dB Six adjustable Vref outputs for microphone bias
Analog Stereo Microphone
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Dolby Technologies
Integrated Headphone Amps (3) S/PDIF In and Out ADAT® Optical “Lightpipe” Output Support
Intel Audio StudioTM from Sonic Focus Maxx PlayerTM from Waves Microphone Beam Forming, Acoustic Echo Cancellation, & Noise Suppression from KnowlesTM
Volume Up/Down Control Jack Insertion Detect and Impedance Sensing supports Jack Retasking and Universal Jacks
IDT™
10-CHANNEL HIGH DEFINITION AUDIO CODEC
1 IDT CONFIDENTIAL
STAC9271/9272/9273/9274 V 1.0 MARCH2007
STAC9271/9272/9273/9274 10-CHANNEL HIGH DEFINITION AUDIO CODEC
PC AUDIO
Table of Contents
1. DESCRIPTION ......................................................................................................................... 14 2. CHARACTERISTICS ............................................................................................................... 15
2.1. Audio Fidelity ................................................................................................................................... 15 2.2. Electrical Specifications ................................................................................................................... 15 2.3. STAC927x Family 5 V, 4.5 V, 4.0 V and 3.3 V Analog Performance Characteristics ..................... 17
3. DETAILED DESCRIPTION ...................................................................................................... 21
3.1. Universal JacksTM .......................................................................................................................... 21 3.2. SPDIF Input ..................................................................................................................................... 22 3.3. SPDIF Output .................................................................................................................................. 23 3.4. ADAT® Output ................................................................................................................................. 23 3.5. Digital Microphone Support ............................................................................................................. 23 3.6. Analog PC-Beep .............................................................................................................................. 27 3.7. Headphone Drivers (Restrictions) ................................................................................................... 27 3.8. Device IDs ....................................................................................................................................... 27
4. FUNCTIONAL BLOCK DIAGRAMS ........................................................................................ 28
4.1. STAC9273/9274 .............................................................................................................................. 28 4.2. STAC9271/9272 .....................................................................