Soundbars: A Market Overview and Design Considerations By David Grant, Sr. Product Marketing Manager, DSP Business Unit, Cirrus Logic, Inc. Is it possible to get a decent-quality audio experience from a flat-panel HDTV chassis? Most of the time, the answer is a clear ‘no.’ Cramming high-quality audio components — good sounding speakers, high-quality amplification and lowresonance cabinet — into the confines of a flat-panel HDTV simply isn’t a feasible solution. The trends of the HDTV market are constantly working against the designer. As a result, most flat-panel HDTVs provide at best a below-average audio experience, characterized by tepid output power through tiny speakers that, more often than not, are incapable of meeting consumer’s expectations when compared to the video experience. Cirrus Logic, Inc. 2901 Via Fortuna Austin, Texas 78746 United States T +1-512-851-4000 F +1-512-851-4977 Toll-Free +1-800-888-5016 Sales Support North America +1 800-625-4084 Asia Pacific +852 2376-0801 Japan +81 (3) 5226-7757 Europe/UK +44 (90) 1628-891-300 learn more at www.cirrus.com Soundbars more soundbars are incorporating a wireless subwoofer allowing for Enter the Soundbar freedom of placement within the room. No, it’s not a place where singles go to drink and listen to music on headphones. It’s a sleek, thin, modern-styled powered speaker that is Soundbars are delivering a solid audio experience in a way that makes it located directly below your brand new flat-panel TV which significantly easy, attractive and cost effective — plus they're delivering on the not-to-be- improves the audio experience without the complexity of an entire home overlooked factor of spousal approval. The industry has recognized that many theater set up that involves hanging surround speakers, running wires, etc. households simply don't want — or don't have the physical structures or budget — to support a complex home theater system, especially in secondary or Like DVD receivers and iPod® docking stations before them — which tertiary installations. To this audience, soundbars are finding a strong market. emerged many years ago and now are considered a standard product category within the consumer electronics universe — soundbars are at the beginning of a new growth wave that will become a solid market segment. Soundbars have broken into the home theater scene by offering an intriguing value proposition. They bridge the gap between the complete audio Soundbars as a HDTV & Monitor Accessory You can't unlink the soundbar from the flat-panel buying experience. The soundbar should best be viewed as an accessory to the HDTV purchase experience, much like HDMI™ cables. shortcomings of the HDTV and high-end home theater systems featuring The current line up of soundbars range from products offering minimal audio an A/V receiver and a full complement of surround-sound speakers. One of the hottest products in consumer electronics today, soundbars are expected to have a world-wide CAGR of 70.3% (2007 – 2012 source: IMS). features at about $99 all the way up to more advanced systems that marry the soundbar into a full-blown home theater in a box (HTiB) system replete with DVD playback. But common varieties of soundbars today have a few Early entrants into the “active” or “amplified soundbar” market, including defining characteristics: two to five speakers, one or more audio inputs, Yamaha, Philips, Sony, Samsung (see figure, below) and Vizio have rightly some level of audio post-processing capability with a virtual surround-sound recognized that for soundbars to gain acceptance by consumers they too or sound beam steering feature in order to "place" the audio around the must adhere to the principles that made flat-panel TVs so successful: listener. Most importantly, they are all designed to sit underneath the TV sleek, minimalist designs that deliver a step up in performance compared itself, blending seamlessly to both appear and function as a single device. to the integrated TV audio system. At the OEM level, what's interesting is that this market has no current Other traditional passive speaker manufacturers such as Polk Audio, incumbent majority market leader today. The game is wide open for Boston Acoustics and Atlantic Technology have also thrown their hat into success, and the field of players is not limited to just the traditional the ring, but one might question whether these products (which are sans speaker manufacturers. amplification and audio processing capabilities) are truly soundbars or simply traditional speaker systems appealing to those who would prefer to run all of the speaker wires to a single location. It can be argued that “true soundbars” are amplified systems with integrated audio decoding and processing, because these are the products that are capable of solving customer problems beyond the desire for aesthetics. Even HDTV manufacturers are looking very hard at soundbars, believing they have a unique advantage compared to other manufacturers because they can develop soundbars that are an extension of their branded TVs, with an integrated remote control and more seamless operation. Other market players include premium electronics brand manufacturers and companies who have made their name in peripheral products, such as docking stations. In the HDTV space, LCDs and plasmas were a significant step forward in technology, quality, size, weight and appearance compared to their CRT and projection system brethren. Likewise, soundbars are finding their niche because they are a significant step-up in sound quality compared to integrated HDTV speakers. Most importantly, they don’t require the chunk of change or sacrifices in visual aesthetics as in home theater systems. Many consumers also shy away from surround-sound systems (HTiBs or VSB210WS 2.1-Channel Soundbar by Vizio ® AVRs with passive speakers) because of the complicated design, wiring This product gets its audio processing power from Cirrus Logic’s CS48520 audio DSP, the digital audio input from S/PDIF sources are handled by the Cirrus Logic CS8416, while the analog inputs are converted to the digital domain by the Cirrus Logic CS5341. and installation headaches that often come with the commitment to achieve the complete "home theater experience." To contrast, more and Cirrus Logic, Inc. www.cirrus.com 2 Soundbars Figure: Samsung’s From there, mid-range models with at least three speakers will require HT-X810 is a full-featured Class-D solutions offering at least 45 to 90 W of total output power. soundbar that boasts 300 W of Typically, mid-range models also offer a separate wireless powered total power. Designed to complement most subwoofer option, which can have output power ranging from 50 W flat-panel TVs, it also features a wireless subwoofer. up to 250 W. It gets its audio processing power from the Cirrus Logic CS48540 Aside from just improving TV sound incrementally compared to the TV’s audio DSP, while the Cirrus Logic CS5345 A/D converter handles audio speakers, most soundbars seek to add additional value by incorporating conversion tasks. other audio features that require post-processing capability, such It makes a lot of sense that soundbars will be successful too. Big box CE as Audistry™ by Dolby,® Dolby Pro Logic® IIx, Dolby Virtual Speaker,® retailers have recently given considerable shelf space to soundbars. To Dolby Headphone,® DTS Surround Sensation Speaker MaxxBass, these retailers, soundbars offer an excellent sales opportunity — especially SRS TruSurround XT®/HD/HD4, Bass Management, multiband parametric as measured by the benchmark revenue per square foot — with strong equalization for speaker/cabinet tuning as well as the brand new margins for all the players. The OEM/ODM, the TV brand and the retailer audio-leveling/modeling technologies that include either Dolby Volume,® are all excited at the idea of being able to tack on a $99 – $499 up sale SRS TruVolume™ or Audyssey Dynamic Volume™ technologies. at the point of sale when selling any HDTV or Entertainment PC product. More advanced soundbars will start to incorporate more speakers, both for improved sound quality as well as to incorporate surround-sound decoding Design Considerations functionality. They’ll need to incorporate HDMI™ 1.3A (or later) in order to If you’re in the game already, or thinking about jumping in while the support high bit-rate bitstream outputs from the latest Blu-ray Disc® water’s still warm, there are a few design and engineering guidelines players, offer wireless subwoofer connectivity and perhaps be ready for to first understand. peripherals such as iPod and Sirius®/XM® satellite radio. Some high-end products today are even incorporating Blu-ray Disc playback directly. For soundbars to prove their worthiness, they have to give consumers a perceived measure of performance improvement compared to the TV audio itself (hence the very reason for their existence), and product designers and marketers would do well to remember that in retail outlets competitive Truly, these systems are not your father’s Home Theater in a Box! Basic IC Requirements products will often sit side-by-side and be judged by consumers — much • Class-D Amplification like after-market automotive audio systems. • Analog, S/PDIF and/or HDMI™ 1.3A (or later) audio inputs First, if you’re making a basic product, such as a two speaker system, at • Audio DSP (for decoding and/or audio processing) minimum you’re looking at having a stereo analog interface and possibly And while the market is wide open for manufacturers, at a quick glance some other audio input such as S/PDIF. Remember that this product is all it may appear that the branded TV manufacturers themselves might hold about blending seamlessly with the sleek and slim TV design, and so going an advantage, due to their ability to give consumers a product that works with Class-D amplifier technology is a foregone conclusion. Class A/B seamlessly with the TV’s operation. In this scenario, the assumption is amplifiers just won’t cut it when it comes to conforming to slim form that the consumer would prefer, and perhaps even pay a little extra for, factors while meeting the power requirements of even the lowest cost a soundbar whose operation could be controlled directly through a single soundbar designs on the market today due to heat generation issues from TV remote or the TV’s onscreen display menus. this inefficient amplifier technology. But because the market is still so fresh and new, there’s not one particular Fifteen watts/channel output for stereo or 2.1 channel configurations is a approach to soundbar design and development that has established itself minimum in order to compete with HDTVs that are already offering ten as a clear-cut leader with consumers. The playing field is still wide open. watts/channel, albeit the drivers and cabinet will go a long way to And most importantly to manufacturers, it’s still a fast-growing market improving the audio along. segment that will likely become a solid niche area of consumer electronics for years to come. Cirrus Logic, Inc. www.cirrus.com 3 Soundbars Soundbar Design Option Examples entry-level Model HDTV Connected HD Audio Soundbar • S/PDIF and/or analog input • Single HDMI™ v1.3 or v1.4 input (when used in conjunction with an HDTV that offers HDMI v1.3 or v1.4 output) • 2.1 channels of output (external powered subwoofer optional) • At least 15 W/channel • Up 5.1 channels of output (with wireless powered subwoofer) • Spatialization/Virtualization/Audio Enhancements (Dolby Virtual Speaker, • Up to 30 W/channel Dolby Headphone, Audistry by Dolby, DTS Surround Sensation,® SRS TruSurround XT/HD/HD4, SRS Headphone 360™) • Audio Leveling & Modeling (Dolby Volume,® SRS TruVolume,™ Audyssey Dynamic Volume & Audyssey Dynamic EQ™) Mid-Range Model • HDMI™, S/PDIF and analog inputs • HD Audio Decoder (DTS-HD® Master Audio, DTS-HD High Resolution Audio, Dolby TrueHD, Dolby Digital Plus) • Legacy Compressed Audio Decoder Support (Dolby Digital, DTS Digital Surround, MPEG Multichannel, AAC) • Matrix Decoding (Dolby Pro Logic IIx, DTS Neo:6, Logic7, DTS Neural Surround) • Spatialization/Virtualization/Audio Enhancements • At least 3.1 channels of output (with wireless powered subwoofer) (Dolby Virtual Speaker, Dolby Headphone, Audistry by Dolby, • At least 15 W/channel DTS Surround Sensation, SRS TruSurround XT/HD/HD4, • Legacy Compressed Audio Decoder Support (Dolby Digital,® DTS Digital Surround™, MPEG, Multichannel, AAC™) • Matrix Decoding (Dolby® Pro Logic® IIx, DTS Neo:6,® Logic7,™ DTS Neural Surround™) • Spatialization/Virtualization/Audio Enhancements (Dolby Virtual Speaker, Dolby Headphone, Audistry by Dolby, DTS Surround Sensation, SRS TruSurround XT/HD/HD4, SRS Headphone 360™) • Audio Leveling & Modeling (Dolby Volume, SRS TruVolume, Audyssey Dynamic Volume & Dynamic EQ ) SRS Headphone 360) • Audio Leveling & Modeling (Dolby Volume, SRS TruVolume, Audyssey Dynamic Volume & Audyssey Dynamic EQ) • iPod/Sirius/XM connectivity & HD/FM/Internet Radio Two-way communication with HDTV via single HDMI connection HDTV splits audio from video signal from HDMI and routes all digital audio signals to internal HDMI Tx — audio is then received by the HDMI Rx inside the Soundbar — Automatically configures A/V sync settings depending on both audio and video mode • Covers legacy video inputs • Single remote control functionality • On Screen Display of soundbar stream type/decoding/processing/volume level status via TV integrated OSD Cirrus Logic, Inc. www.cirrus.com 4 Soundbars Cirrus Logic Soundbar Reference Design Solutions Audio Processor (CS48520, CS48DV2B, CS48AU2B) Cirrus Logic has developed proven, turnkey soundbar I2S SRS TruVolume + SRS TruSurround HD • CS48520 • Cirrus Dynamic Volume Leveler + Cirrus Virtualizer Technology + Cirrus Bass Enhancement + Cirrus BandXpandeR • CS48520 • Audistry (by Dolby) + Dolby Pro Logic llx + Dolby Virtual Speaker/Dolby Headphone • CS48520 • Dolby Volume + Audistry (by Dolby) / Dolby Pro Logic llx + DVS/DH • CS48DV2B • Audyssey EQ + Audyssey Spatial EQ + Audyssey Dynamic Volume/EQ + ABX/Bass XT • CS48AU2B • reference designs with all the required components — DSP, digital amplifier, DAC, S/PDIF receiver — to get customers into production fast. These reference designs are FCC Class B certified, RoHS compliant and come IS 2 Audio DAC (CS4353) I2S code and Gerber files. • More • Cirrus Logic Soundbar Reference Design Examples CRD-SB15Wx2 15W x 2 Channel Soundbar with L Class-D Audio Amplifier With Integrated SRC I2S S/PDIF Receiver Optical In Subwoofer Out I 2 S Out Tone Control Parametric EQ Bass Management Delay Volume Control Custom Audio Proc. bill of materials, system-level microcontroller source Wireless Tx Header I 2 S In I2S equipped with complete design files such as schematics, 2 V RMS (CS4525) R (CS8416) Analog Audio In 1 2 VRMS Subwoofer Line Out (see diagram at right) ADC In Analog Audio In 2 CRD-SB30Wx2 30W x 2 Channel Soundbar with 2 VRMS Subwoofer Line Out (see diagram below) CRD-SB15Wx2 15W x 2 Channel Soundbar with 2 VRMS Subwoofer Line Out Featured Cirrus Logic ICs • CS48520 32-bit audio DSP • CS4525 30W digital amplifier with stereo A/D converter • CS4412A 30W Class D audio power stage (CRD-SB30Wx2 only) • CS4353 Stereo D/A converter with 2 VRMS line out • CS8416 S/PDIF receiver Audio Processor (CS48520, CS48DV2B, CS48AU2B) SRS TruVolume + SRS TruSurround HD • CS48520 • Cirrus Dynamic Volume Leveler + Cirrus Virtualizer Technology + Cirrus Bass Enhancement + Cirrus BandXpandeR • CS48520 • Audistry (by Dolby) + Dolby Pro Logic llx + Dolby Virtual Speaker/Dolby Headphone • CS48520 • Dolby Volume + Audistry (by Dolby) / Dolby Pro Logic llx + DVS/DH • CS48DV2B • Audyssey EQ + Audyssey Spatial EQ + Audyssey Dynamic Volume/EQ + ABX/Bass XT • CS48AU2B • I2S Audio DAC (CS4353) I2S I2S Tone Control Parametric EQ Bass Management Delay Volume Control Custom Audio Proc. 2 V RMS Subwoofer Out I 2 S In I S Out 2 • More • L Class-D Audio Amplifier With Integrated SRC Optical In S/PDIF Receiver I2S (CS4525) (CS8416) R Class-D Audio Power Stage (CS4412A) Analog Audio In 1 ADC In PWM Out PWM In Analog Audio In 2 CRD-SB30Wx2 30W x 2 Channel Soundbar with 2 VRMS Subwoofer Line Out Cirrus Logic, Inc. www.cirrus.com 5 Soundbars Soundbar Reference Designs — Featured ICs CS485x0 / CS48DV2B / CS48AU2B Audio DSPs Features • Multichannel 32-bit audio post processing at 150 MHz with dual MACs (300 M MACs/Sec) • 192 kHz S/PDIF Tx • SPI™/I²C® serial control port • CS48520 supports 4 channel 32-bit PCM I/O • Low-power standby: 260μW • CS48540 supports 8 channel 32-bit PCM I/O • Large on-chip RAM & ROM • CS48560 supports 12 channel 32-bit PCM I/O • DSP Composer programmable GUI software tool • CS48DV2B supports 2 channel Dolby Volume processing including • The very latest licensed third party audio processing algorithms concurrent support for: Audistry by Dolby or Dolby Pro Logic IIx from SRS Labs, Dolby Laboratories, DTS Inc., EmbracingSound, or Dolby Virtual Speaker Expamedia, Waves, and Audyssey Laboratories. • CS48AU2B supports 2 channel Audyssey processing including: Audyssey EQ, Audyssey Dynamic Volume/EQ, Audyssey Bass XT/ • An extensive library of Cirrus proprietary downloadable and customizable firmware Audyssey Adaptive Bass eXtension (ABX) Multichannel and Virtual Surround Audio Processing Audyssey™ EQ (CS48AU2B) Audistry™ by Dolby ® Dolby® Pro Logic® IIx Dolby® Virtual Speaker ® Serial Audio Input Dolby Headphone ® ® DTS Neo:6 ® SRS® Circle Surround® Auto SRS® Circle Surround® II SRS® TruSurround XT,® HD, HD4™ SRS TruVolume™ ® MaxxBass® by Waves …and more RTC, Timers Advanced Audio Processing Custom Audio Processing Audyssey™ Dynamic Volume / EQ (CS48AU2B) Cabinet / SPKR Tuning Serial Audio Output Dolby Volume® (CS48DV2B) Mixers Multichannel X-Bar Mixer Routers A / V Sync Fine Adjustment Crossovers Volume Cntrl / AGC Delays Per Channel Level Trim Filters — FIR, L-R, Hi, Lo, Butterworth Tone Control Dynamic Range Compression 11-band PEQ Limiters Bass Management …and more S / PDIF Transmitter …and more Serial Control Port GPIO CS485xO / CS48AU2B / CS48DV2B Cirrus Logic, Inc. www.cirrus.com 6 Soundbars Soundbar Reference Designs — Featured ICs ( continued ) CS4525 30 W Digital Audio Amplifier with Integrated Stereo A/D Converter Features • Fully integrated power amplifier • Integrated stereo A/D converter, sample-rate converter, digital audio processor, PWM controller, power MOSFETs • High efficiency • No heatsink required • Programmable power foldback on thermal warning • > 100 dB dynamic range and < 0.1% THD+N @ 1 W • Configurable outputs (10% THD+N) • 1 x 30 W into 4 , parallel full-bridge • 2 x 15 W into 8 , full-bridge • 2 x 7 W into 4 , half-bridge + 1 x 15 W into 8 , full-bridge • 24-bit stereo A/D converter with 95 dB dynamic range and -88 dB THD+N • Thermally enhanced QFN package, lead-free assembly 2.5 V to 5 V 9 V to 18 V VP System Clock Crystal Driver I/O Crystal Oscillator Driver Audio Processing PWM Gate Drive Amplifier Out 1 Gate Drive Amplifier Out 2 Gate Drive Amplifier Out 3 Gate Drive Amplifier Out 4 Parametric EQ Sterero Analog In Serial Audio Clocks & Data Multibit ΔΣ ADC High-Pass Bass / Treble Adaptive Loudness Compensation Serial Audio Input Port 2-Ch Mixer 2.1 Bass Mgr Linkwitz-Riley Crossover Serial Audio Date I/O Serial Audio Clocks & Data Serial Audio Delay Interface Error Protection Reset Cirrus Logic, Inc. Volume Auxiliary Serial Port HP Detect / Mute Interrupt I 2C or Hardware Configuration De-Emphasis Multibit ΔΣ Modulator with Integrated Sample Rate Converter Thermal Warning Register / Hardware Configuration Thermal Feedback Over Current Under Voltage PGND PWM Modulator Output 1 PWM Modulator Output 2 www.cirrus.com 7 Soundbars Soundbar Reference Designs — Featured ICs ( continued ) CS4412A 30W Quad Half-Bridge Digital Amplifier Power Stage Features • Configurable outputs • Built-In protection with error reporting • 2 x 15 W into 8 , full-bridge • Over-current • 1 x 30 W into 4 , parallel full-bridge • Thermal warning and overload • 4 x 7 W into 4 , half-bridge • Under-voltage • 2 x 7 W into 4 , half-bridge + 1 x 15 W into 8 , full-bridge • +8 V to +18 V high voltage supply • PWM Popguard® for quiet startup • Space-efficient thermally-enhanced QFN • No bootstrap required • No external heat sink required • 100 dB dynamic range — system level • Low quiescent current • < 0.1% THD+N @ 1 W — system level • Low power standby mode 2.5 V to 5 V 8 V to 18 V VP In 1 In 2 In 3 Non-Overlap Tme Insertion Gate Drive Amplifier Out 1 Non-Overlap Tme Insertion Gate Drive Amplifier Out 2 Mode Configuration In 4 Reset Hardware Configuration Control Logic Non-Overlap Tme Insertion Gate Drive Amplifier Out 3 Current & Thermal Data Protection & Error Reporting Non-Overlap Tme Insertion Gate Drive Amplifier Out 4 PGND Cirrus Logic, Inc. www.cirrus.com 8 Soundbars Soundbar Reference Designs — Featured ICs ( continued ) CS4353 3.3 V Stereo Audio DAC with 2 V RMS Line Output Features • Multi-bit Delta-Sigma Modulator • 106 dB A-wt dynamic range • -93 dB THD+N • Single-ended ground centered analog architecture • No DC-blocking capacitors required • Integrated step-up/Inverting charge pump • Filtered line-level outputs • Selectable 1 or 2 VRMS full-scale output • Low clock-jitter sensitivity • Low-latency digital filtering • Supports sample rates up to 192 kHz • 24-bit resolution • Power supplies • +3.3 V charge pump and core logic • +3.3 V analog • +0.9 to 3.3 V Interface • 24-pin QFN, Lead-free assembly Interface Supply (VL) +0.9 V to +3.3 V Digital Core Logic and Charge Pump Supply (VCP) +3.3 V Power-On Reset Reset Hardware Control Level Shifter Hardware Control Interpolation Filters Multibit ΔΣ Modulator PCM Serial Audio Port Serial Audio Input Cirrus Logic, Inc. Analog Supply (VA) +3.3 V Step-Up + VA_H Inverting + VA_H Ground-Centered, 2 VRMS Line Level Outputs Left Channel DAC Pseudo Diff. Input Right Channel Auto Speed Mode Detect www.cirrus.com 9 Soundbars Soundbar Reference Designs — Featured ICs ( continued ) CS8416 192 kHz Digital Audio Receiver Features • Compatible with EIAJ CP1201, IEC-60958 and AES3 standards • 8:2 S/PDIF input mux • Selectable signal routing to three general-purpose output pins • S/PDIF to Tx inputs • Flexible 3-wire serial digital output port • 32 kHz to 192 kHz sample frequency range • Low-jitter clock-recovery • Pin and microcontroller read access to channel status and user data • SPI™ or I²C software mode and standalone hardware mode • Differential cable receiver • On-chip channel status data buffer memories • Auto-detection of compressed audio input streams • OMCK system clock mode • 3.3 V analog supply (VA), 3.3 V digital supply (VD) and 3.3 V to 5 V digital interface supply (VL) • Package: 28-pin SOIC, 28-pin TSSOP, 28-pin QFN; lead-free assembly VA RXN RXP0 RXP1 RXP2 RXP3 RXP4 RXP5 RXP6 RXP7 AGND FILT Clock & Data Recovery Receiver 8:2 MUX Misc. Control RST Cirrus Logic, Inc. RMCK VD AES3 S/PDIF Decoder Format Detect VL DGND De-emphasis Filter C & U Bit Data Buffer Control Port & Registers OMCK Serial Audio Output n:3 MUX OLRCK OSRCK SDOUT GPO0 GPO1 AD2/GPO2 SDA/CDOUT SCL/CCLK AD1/CDIN ADO/ CS www.cirrus.com 10 Soundbars Design Resources DSP Composer™ — Graphical DSP Programming Tool CS4525 Parametric EQ Filter Wizard • Visual programming of audio processing The CS4525 Parametric EQ Filter Wizard provides a graphical interface to • User friendly and easy to design the Parametric Equalization, Bass Manager, and Tone Control Features of the CS4525. The CS4525 Parametric EQ Filter Wizard application note • DSP experts can use it to improve time-to-market includes the necessary information so that a user can quickly and easily • Non-DSP experts can use it and create efficient implementations configure any or all of the five on-chip biquad filters, the Bass Manager • Very efficient code generation crossover frequency, and the bass/treble shelving filters available in the • All basic prototypes hand-optimized and pre-stored CS4525 via the application’s Graphical User Interface (GUI). • Easy design using schematic-like wiring of modules • Self documenting design flow • Allows hierarchical blocks and custom library creation • Perfect for algorithm design and tweaking • Allows run-time design/parameter modification while listening/taking measurements • Implementation is ready after algorithm tweaking Please visit http://www.cirrus.com/sb for more information on the CRD-SB30Wx2: • Product Brief • Registration for Reference Design Installer • DSP Composer and Micro Condenser, Application Notes, Firmware, and Users Guide Installer Cirrus Logic offers a wide selection of free tools and resources to help system designers implement audio products fast and efficiently. Cirrus Logic, Inc. Please visit http://www.cirrus.com/en/support/ for more information on the following: • Product Data Sheets • Tools and Software • Reference Designs and Evaluation Boards • Application Notes • User Manuals • Product Bulletins www.cirrus.com 11 ©2009 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.