AP8302 SRS WOW HD Audio Processor IC OVERVIEW The AP8302 is a WOW HD audio enhancement processor based on SRS Labs’ award-winning WOW technology. WOW delivers a broadened stereo field, improved dynamics and increased bass performance over stereo headphones or a wide range of speaker sizes. WOW HD goes a step beyond WOW by delivering a new purity to sound with cleaner, livelier audio quality (definition), advanced bass enhancement for fatter low frequency bass (TruBass) and incredibly innovative “center” control to place center information in the stereo mix in the forefront or toward the back, in a delicate balance with the 3D stereo width control (SRS 3D). AP8302 operates under hardware mode or software mode in which the audio enhancement features are programmable through I2C bus, making it suitable for wide range of applications with or without external MCU. Extended flexibility in software mode operation allows AP8302 to load preset configuration of WOW HD stored in external EEPROM for optimal audio effect. Enhanced selectable TruBass filter setting by pin settings for speaker with typical resonant frequency between 40Hz and 400Hz minimizing external components. Apart from the integrated TruBass audio enhancement, separate subwoofer output is also available to support external connection to a subwoofer for dedicated bass reproduction. The built-in input volume control prevents signal clipping during audio enhancement while incorporating output volume control further reducing the total number of external components. APPLICATIONS SRS AUDIO TECHNOLOGIES • • SRS WOW HD • SRS WOW • SRS 3D • SRS FOCUS • SRS TruBass • SRS Headphone • Definition Docking system, TV set SYSTEM BLOCK DIAGRAM MCU or EEPROM ( Software Mode only) 2 I C Bus Power Audio Source AP8302 Speaker Amplifier FEATURES • • • • • • • PB_AP8302-Rev1 Cost effective single chip sound enhancement solution with SRS Lab’s WOW HD technology Definition exposes more details of musical and theatrical vocals and high frequency elements present in audio source Center control incorporated in SRS 3D adjusts the center content of stereo image forefront or backward and creates an ideal 3D sound space TruBass filter selectable without external component SRS Headphone mode incorporated with on/off control All chip features real time software adjustable by I2C bus Operating voltage: 2.7V to 5.5V