Realtek AC'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.

Realtek AC 97 Vista Driver Features:
* Meets performance requirements for audio on PC99/2001 systems
* Meets Microsoft WHQL/WLP 2.0 audio requirements
* Eight-channel DA converter (48KHz)
* Stereo AD converter (48KHz)
* Complies with AC'97 Rev 2.3 specifications:
o Jack sensing on Front-Out, Surround-Out, Cen/LFE-Out, Surround-Back-Out, Mic-In, Line-In, and Front-Mic-In
o Clock input support options:
+ 14.318MHz PLL (may be set to 24.576MHz) to eliminate crystal
+ 12.288MHz BITCLK input
o Integrated PCBEEP generator
o Interrupt capability
o Page and analog Plug & Play registers
* Three analog line-level stereo inputs with 5-bit volume control: Line-In, CD, Aux
* High-quality differential CD input
* Two analog line-level mono inputs: PCBEEP, Phone-In
* A dedicated stereo Front-Mic input for front panel applications
* Line-In, Aux, and Mic-In can be shared with Surround-Out, Surround-Back-Out, and Cen/LFE-Out. (FlexJack®)
* +20dB boost preamplifier for Mic input
* Both Front-Out and Surround-Out integrate 50mW/20ohm amplifiers
* External Amplifier Power Down (EAPD)
* Power management and enhanced power saving features
* Stereo Mic record for AEC/BF application
* Supports Power-Off CD operation
* Adjustable VREFOUT control
* Supports 48KHz S/PDIF output
* Supports 32K/44.1K/48KHz S/PDIF input
* Three Universal Audio Jacks (UAJ®): Front-Out, Line-In, and Mic-In
* Six Jack Detect pins for automatic jack sensing
* Power support: Digital: 3.3V; Analog: 3.3V/5V
* Standard 48-pin LQFP package
* EAX™ 1.0 & 2.0 compatible
* Direct Sound 3D™ compatible
* A3D™ compatible
* I3DL2 compatible
* HRTF 3D positional audio
* Sensaura™ 3D Enhancement (optional)
* 10-band Software Equalizer
* Voice cancellation and key shifting in Karaoke mode
* AVRack® Media Player
* Configuration Panel for enhanced user experience