Not ALL DirectSound games need ALchemy? In the list below I will note in the comments if a DirectSound game needs ALchemy to restore audio functionality.How do I know when a DirectSound game needs ALchemy? I go through a process of checking three things: 1) Are there options for EAX or DirectSound3D hardware acceleration that are disabled? 2) Is surround sound working? 3) Given surround sound functions without ALchemy and there are no visible EAX or hardware options, if I add the game to ALchemy, is there a noticeable change in the audio?.For Realtek devices, you'll use '3D SoundBack' (run it in Vista compatibility mode!) and for ASUS cards you'll use DS3D GX. Modern games typically don't require ALchemy, but there will be some exceptions depending on how the developer implemented the audio. ALchemy - ALchemy is an application that works with Creative sound cards to restore DirectSound 3D functionality in games designed to work with Windows XP's audio functionality, the audio in these games no longer properly functions in NT6+ operating systems as a result of changes made to how Windows handles audio.This is relevant because the way Windows handles audio was changed after NT5, typically requiring the use of software like ALchemy to restore proper audio functionality in games played on NT6.x and newer operating systems. NT# denotes the versions of Windows that came after Windows XP.2 often denotes the number of subwoofers that can be connected to an AV receiver. If I've listed a game as '5.0', this means that no audio is sent to the LFE channel. Since I'm discussing game audio here, the LFE channel will be represented by the '.1' when discussing '5.1' or '7.1'. Sending lower frequencies to the LFE channel is either sometimes overlooked in development or perhaps omitted as a design choice which results in games not delivering bass to the subwoofer. While this channel isn't strictly for subwoofers, the LFE channel in a PC audio context is typically referring to the subwoofer output.

LFE (low-frequency effect) - The LFE channel is designated as a channel that carries lower-frequency audio.

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