INTRODUCTION DIFFERENT FILE FORMATSWHAT IS MP3?MP3 is short for MPEG-1 Audio Layer 3-compressiontechnology. The termMP3 files usually refers to files containing music of some kind. MP3 files arecompressed to approximately 1/12 of a normal music file that you find on aCompact Disc. MP3 is used under license from Thompson.WHAT IS MP4?MP4 or MPEG-4 is not only a file format for video and sound but also the nameof a Codec (COmpression and DECompression) in other words a compressedfile format. This means that you can have a QuickTime video (.mov) with videoand sound compressed with an MPEG-4 codec.JOS MP-500 only plays video compressed with our transcoding software JOSTranscoder which is available for download at www.jensofsweden.com.WHAT IS WMA?WMA is short for Windows Media Audio and is a popular alternative toMP3. WMA gives you the opportunity to compress files harder with outlosing quality. WMA files are compressed to approximately 1/24 of a normalmusic file that you find on a Compact Disc. WMA is used under license fromMicrosoft.WHAT IS OGG?OGG-Vorbis is an open source format with better quality than MP3. It alsoproduces smaller files then MP3 with equal quality.PLAYER FIRMWAREUPGRADABLE FIRMWAREMP-500 has an upgradable firmware, this makes it possible for you todownload and install the latest firmware from www.jensofsweden.com when anew firmware is release.FIRMWARE VERSION 1.5This manual refers to firmware version 1.5 if your player has an olderfirmware version download and install the latest firmware available on www.jensofsweden.com.38