Realtek AC 39 97 Audio Driver for Windows Vista supports all ALC series audio chipsets from ALC101 up to ALC861 It is used as onboard sound on many motherboards Compatible with ALC 101 201 202 203 250 650 655 658 850 chipsets It is highly recommended to always use the most recent driver version available
Featuring four 16 bit two channel DACs and a stereo 16 bit ADC the ALC850 is an AC 39 97 Rev 2 3 compatible multi channel audio CODEC designed for PC multimedia systems The ALC850 incorporates proprietary converter technology and fully meets performance requirements for PC99 2001 systems Four pairs of stereo outputs with 5 bit volume control and multiple stereo and mono inputs along with flexible mixing and gain and mute functions provide a complete integrated audio solution for PCs The digital interface circuitry of the ALC850 operates from a low power consumption 3 3V power supply
Two integrated 50mW 20ohm headphone audio amplifiers provide high quality personal audio listening Utilizing Universal Audio Jack reg technology Line In and Mic In can also serve as Headphone Out with an amplifier advantage

The ALC850 integrates an on board dual PLL clock generator 14 318MHz and 24 576MHz saving the cost of a 24 576MHz crystal A PCBEEP generator is built in and can be programmed by the BIOS to generate POST beeps without a buzzer S PDIF input and output functions are also supported offering easy connection of PCs to consumer electronic products such as AC3 decoders speakers and mini disk devices
The ALC850 supports host soft audio from Intel ICHx chipsets as well as audio controller based VIA SiS ALi AMD nVIDIA ATI chipsets Bundled Windows series 98 ME NT 2000 XP and Linux drivers EAX Direct Sound 3D I3DL2 A3D compatible sound effect utilities supporting Karaoke 26 types of environment sound emulation 10 band equalizer HRTF 3D positional audio and Sensaura trade 3D optional providing an excellent entertainment package and game experience for PC users In addition the ALC850 is embedded with an impedance sensing capability to detect when a device has been connected to input or output jacks