There are lots of different numbers involved and none coincide, but the latest installer is listed as 1.1 on
this page, and links to
this page, where it's listed as 1.9.9.
Rest assured I've provided the latest, sorry for the confusion.
OpenAL Installer for Windows
Updated on 12/12/2006
Updated Winter 2006 : Version 1.9.9
The OpenAL Installer for Windows will install the OpenAL 1.1 library, enabling support for core OpenAL operations as well as extensions such as EAX and EFX. The installer supports both 32-bit and 64-bit versions of Windows.
DLL Version numbers:
* OpenAL32.dll version 6.14.357.19
* wrap_oal.dll version 2.1.4.0
Changes and Bugfixes
* Fixed Windows 98 crash bug
* Fixed floating-point related slow-down in "Generic Software" device
* Fixed Source Gain problem on Stereo Buffers.
* OpenAL Router search path now includes Router's directory.
* Windows Vista Default Device and Device Enumeration fixes.
* ALC Capture Extension can now be used independent of playback.