Approach Index File
4.1 | 14 Votes
What is an ADX file?
Stores the indexing information for a Lotus Approach relational database
Programs that open ADX files
3.2 | 6 Votes
An ADX file may also be an audio file used by a video game developed using CRIWARE-ADX. Typically, ADX files contain background music played in a game. For example, Sonic Mega Collection contains music saved as ADX files.
CRI Middleware developed the ADX format for use in its own and other developers' video games. Notably, several games in the Sonic the Hedgehog series use ADX audio files.
Primarily, ADX files contain background music that is meant to be looped during gameplay (e.g., while a player is playing a specific level). ADX files are compressed using a lossy Adaptive Differential Pulse-Code Modulation (ADPCM) variant.
NOTE: Some Sofdec videos (.SFD files) contain interleaved ADX audio.