RCA/Lyra Handheld MP3 Player Database Index is another application in which file extension IDX is used in its index format in a number of ways. In this database, IDX files are generated and stored along DAT files. This process takes place when MP3 files are being registered on a Lyra MP3 player. These files are important in locating details of tracks such as the genre in which the songs belong, the album from which they are taken as well as the title of the song and artist behind them. All these categories contain the extension IDX

Cannot open idx files in Windows?

Not being able to open idx files in Windows may be a result of registry errors or not having the appropriate application installed. It is strongly recommended that you scan your computer for registry errors (free).

The size of file extension IDX files normally varies in accordance with the application in which they are being used as well as the location in which they are stored on the computer or any other device where they are held. In the Lyra MP3 for instance they are usually less than one kilobyte. In the VSFilter Index File they are used to place diverse subtitle formats on the video player. This is done through an encoding process or playback mechanism. These extension IDX files are always placed in pairs along with SUB files.