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Basic features: ` 6 channel, 16-bits DACs with SNR > 90 dB. ` 2 channel, 16-bits ADCs with SNR > 85 dB. New features of AC'97 2.3 codec: ` Digital PC Beep support. `2 Stereo microphone support. ` Extensive jack detection via proprietary resistors network method that can monitor plugging status of every jack. ` Precise advanced impedance sensing function for audio device class discoverability. Miscellaneous features: ` Compliant with Intel® AC'97 Rev 2.3 Spec. ` Meeting with Microsoft® PC2001 requirements ` Built-in 14.318MHz to 24.576MHz PLL, which can save the BOM cost of external crystal. ` Advanced power management and power saving capabilities. ` Industry standard 48-lead LQFP package. ` Analog power supply is 5V, digital power supply is 3.3V. Versatile I/O & functionalities support: ` Stereo Line-in function shared with Surround out. ` Stereo Microphone function shared with Center/LFE out. ` High quality pseudo-differential analog CD Audio input. ` Dual analog & digital PC BEEP support. ` AUX legacy analog I/O support. ` 2 GPIO (General Purpose I/O) support. ` EAPD (External Amplifier Power Down) support. ` S/PDIF I/O function: Output: 96 / 48 kHz with 24 / 20 / 16 bits Input: 48 / 44.1 / 32 kHz with 20 / 16 bits S/PDIF In is featured with interrupt, auto-lock, anti-noise, and anti-distortion functionalities support. Valuable add-on software technology: ` CMI9761A+ supports Dolby® Digital Interactive Content Encoder (DDICE) for easy-connection with consumer acoustics as media center/game console applications ` Xear3D™ sound support, including Earphone Plus and 5.1CH SPEAKER SHIFTER. ` Sensaura® HRTF 3D positional sound support. ` Support most industry standards of PC 3D sound for gaming, including Creative EAX™ 2.0 / 1.0 , Microsoft DirectSound™ 3D, A3D™ 1.0 and more. ` Unique karaoke function support featured with microphone echo, key shifting, and vocal cancellation. ` 10-band equalizer with 12 pre-set settings. ` 27 kinds of listening environments support together with 3 kinds of room sizes emulation. ` Dynamic AGC(auto-gain control) technology.