By ominous onion
Updated with OpenAL Soft 1.20.1
This project is for a DirectSound DLL replacement. It implements the
DirectSound interfaces by translating the calls to OpenAL, and fools
applications into thinking there is a hardware accelerated sound device. EAX is
also implemented (up to version 4) by using OpenAL's EFX extension, allowing
for environmental reverb with sound obstruction and occlusion effects.
Ultimately, this enables DirectSound applications to enable their DirectSound3D
acceleration path, and turn on EAX. The actual processing is being done by
OpenAL with no hardware acceleration requirement, allowing it to work on
systems where audio acceleration is not otherwise available.
Or more succinctly: it enables DirectSound3D surround sound and EAX for systems
without the requisite hardware.
To build the source, you will need CMake 2.6 or newer (you can get it from
<http://www.cmake.org/>). You can either use the CMake GUI, specifying the
directories for the source and where the build files should go, or using one of
the command-line programs, for example by first making sure to be in an empty
directory where the build files will go (such as the provided build/ sub-
directory) and running cmake with the path to the source.
Once successfully built, it should have created dsound.dll.
Once built, copy dsound.dll to the same location as the desired application's
executable. You must also provide an OpenAL DLL in the same location, named as
dsoal-aldrv.dll, or else the DLL will fail to work. Some applications may need
to be configured to use DirectSound3D acceleration and EAX, but it otherwise
goes to work the next time the application is run.
Source releases, the Git repository, and Windows binaries for OpenAL Soft are
available at its homepage <http://kcat.strangesoft.met/openal.html>.
Instructions are also provided there.
DirectSound Control (DSC) is a wrapper DLL which allows to tweak some function calls of games to Microsoft DirectSound (part of DirectX). It's NOT a replacement for DirectSound or any game sound engine. DSC allows to "work around" some driver- and application limitations and bugs. DSC can help you to enable 3D sound with games that disables this functionality by default. It can enhance the sound quality in many ways.
This guide was originally hosted on Creative's site (http://connect.creativelabs.com/alchemy/Downloads/ALchemy%20Quick%20Start.pdf) and provides instructions for configuring the ALchemy software to restore legacy DirectSound 3D effects to older games in Vista and newer Windows operating systems.
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