Realtek released version 3.40 driver for their ALC AC97 audio chipsets. The driver supports all ALC series audio chipsets from ALC100 up to ALC650 mainly used as onboard sound on various mainboards.

History:
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A3.40 -
1. The setting of switching Center/LFE is saved before system is shut down, restored after system boot up.
2. Fix click noise generated by playing short time wave.
3. Fix some problem about AC3 stream for VIA chipset.
4. Add some customize settings.

A3.38 -
1. Fix some problem for Ali 1563 chipset.
2. Set 1 timer to check SPDIF in status for ALC650 ver.F
3. Save playback volume value to registry key when the mixer is adjusted.
4. Combine Cyclic WDM driver and PCI WDM driver.

A3.37 -
1. Update DirectSound 3D Positional Audio Engine to fix some noisy problem for some DirectSound3D game (like Unreal Tournament 2003).
2. A3D compatible
3. Correct the gain settings of master volume for ALC650 ver.F