Realtek AC'97 Audio CODECs are not sound card controller drivers.
AC 97 Sound CODECs work with "software" sound controllers built into motherboards or the motherboards South Bridge chipset..
You need a driver for the AC97 (software) sound controller built into the South Bridge chipset that will be the bridge between the controller and the AC97 CODEC. .
Short for compressor/decompressor, a codec is any technology for compressing and decompressing data
Software sound cards also use AC97 CODECs
Realtek purchased http://www.avance.com
who made sound chips for sound cards. Software sound cards that use AC97 CODECs.
AC97 CODECs are specific to the sound solution (chipset) built into the MB chipsets or the sound card.
Realtek sound controller use Realtak AC97 CODECs.
Avance Logic, Inc. sound chips (ALS; Avance Logic Sound) now Realtek driver download here;
Note; sound chips made "after" the Avance Logic purchase are marked RTLXXXX
Realtek AC'97 Audio CODEC download here;
There are two major components for AC'97 sound cards: AC'97 CODEC and audio controller. Realtek is an AC'97 CODEC manufacturer (software). The most important part of an AC'97 sound card is the audio controller in the chipsets, provided by the chipset vendor.
In fact, the AC'97 audio CODEC is a standard CODEC for Realtek audio controllers. The most important part is the audio controller driver which is provided by South Bridge chipset vendors. We are an AC'97 audio CODEC vendor, not a South Bridge chipset vendor. AC'97 audio CODEC drivers are varied for different audio controllers. But if the audio controller is the same brand, the same drivers can be used for most AC'97 audio CODECs. If you can find drivers for your audio controller for the other OSes, they can usually be used with Realtek AC'97 CODECs.
Older Realtek (Avance Logic) and Intel AC97 drivers;
Note; the latest AC97 CODEC from Realtek requires DIRECTX 8.0 or above.
Sound delay; VXD driver verses WDM* driver;
We offer two different types of audio drivers for MS Windows OSes. The WDM driver is for Win98SE or later versions and the VXD driver is for Win98/95. Recommended by MS, the WDM driver had better not be used on Win98. That is why we normally use the VXD driver for Win98 (4.10.1998). If you don't encounter any problems using the WDM driver with Win98, you can keep on with it.
For some reasons, we do not support DirectSound directly in the VXD driver. We just have the DirectSound software emulation layer do it for us. I think that is why you have delay in sounds in DirectSound games. We suggest you to upgrade your OS to Win98SE or later versions. Our WDM driver has more powerful features, such as EAX support, and it will support DirectSound better than the VXD driver
Use the Intel chipset ID program to get the correct sound driver for your Intel board with integrated sound.
Avance Logic AC97 sound built into older Intel chipsets; Infomation here;
Audio components integrated into Intel® chipsets consists of 2 components - an Audio Codec '97 (AC'97) digital controller, which is built into the I/O Controller Hub (ICH) of the chipset, and a AC'97 codec, which is the analog component of the architecture. AC'97 defines a high-quality, 16- or 20-bit audio architecture for the PC that is used in the majority of today's desktop platforms.
AC'97 Audio Drivers and Software
Due to the variety of different AC'97 codecs that are available, Intel does not offer AC'97 reference audio drivers for public download. Please refer to the system or motherboard manufacturer for any driver downloads or updates. If you have an Intel motherboard, please refer to the motherboard support site to determine which audio component is used on your motherboard.
* All WDM drivers are designed to work with ACPI (Advanced Configuration and Power Interface) enabled motherboards and Operating Systems.