Free MP3 compression utilities

BladeEnc MP3 Encoder - Quality MP3 compression utility at higher bitrates. Format is command line. Can be plugged directly into many popular 3rd party products, giving them integrated mp3 encoding abilities.
Download          OS: Windows/Linux

ASPI Rip - Rip / Grab CD using ASPI layer to assure perfect Digital Audio Extraction (DAE). Encode files or record from sound card inputs to MP3 or Ogg Vorbis. Features included in ASPI Rip: ASPI layer CD Digital Audio Extraction (DAE) for quality Ripping (no pops, clicks). MP3 (Fraunhofer) external Encoder support (ACM). L.A.M.E. front end support for MP3 Variable bit rate or Constant bit rate Encoding. Ogg Vorbis encoding. GUI Encoder operation for exe's, no dos windows. Run multiple instances of the program, one per CD drive for simultanious Ripping and Encoding. Auto Encode multiple Recordings from any input with Recording Timer. Auto normalization. (volume leveling feature). Re-sample MP3 to MP3 to other bit rates (for down sampling to use low rates in hand held devices). Choice of CD output sample rate from Ripper 44,100 hz or 22,050hz. freedb agent CD info lookup for MP3 or Ogg Tagging and Re-naming from Internet. freedb to cdplayer.ini batch lookup program. Analog Rip included for a ripping alternative to ASPI. Customisable Template "Tag to Filename" Re-Namer. Re-Name with optional Letter Case (lower, UPPER, Norm). Auto Create M3U Playlist file from MP3's. Use CDplayer ini or Existing MP3 file for Tag info. Tagging in ID3 retains Track position in MP3 or Ogg. Imports CSV (MS Excel) and Tab delimited txt files into Tagger window. ID3v1.2 tag provides double ID3v1.1 size with your own defined SubGenre. Ogg Vorbis tagging. Optional Wave Delete after Encoding. Preview Wave Before Encoding or send to Audio Edit to Edit. Right Click Windows support + Drag and Drop support. Auto send to JukeBox Decoder for Playback, Listing or Tagging. Detailed popup balloon Help tips on each control. Toggle on or off File Associations and Desk top Icon. No technical ripper settings required, fully automated speed, jitter and buffer adjustment with two simple error control modes.
Download          OS: Windows 95/98/Me/NT/2000/XP           

LAME MP3 Encoder - One of the best mp3 compresos around. Very high encoding speed and quality. It is command line operated, but you can download a number of graphical frontends for the encoder.
Download          OS: Windows | Linus | Mac OS | Solaris

EAC - EAC - Exact Audio Copy is a freeware CD ripper (actually cardware, just send a stamped post card to the author). Secure, fast and burst extraction methods selectable. Fast extraction should run at the same speed as other grabbers, but is probably not exact anymore. Burst mode just grabs the audio data without any synchronization. Read error and complete loss of sync detection and correction in secure modes, as far as possible. Output of time positions of all non-exact corrections and listen to these positions. Copy of ranges of music data, not only tracks. Automatic Speed reduction on errors and fallback afterwards. Normalization of extracted audio. Usage of the Windows Audio Compression Manager (ACM Codecs) for direct compression e.g. to MP3 waves. Support for the BladeEnc DLL that is usable like an ACM Codec for online MP3 compression. Support of external MP3, VQF, RA and AAC encoders for automatic compression after extraction. Batch compression and decompression of/to WAV files. Compression offset support for exact compression/decompression...
Download          OS: Windows 95/98/Me/NT/2000           

AllMP3 Software Sections: Mp3 Players [1], Mp3 Players [2], Mp3 Encoders, Mp3 Rippers, CD Recorders, Mp3 mixing, Mp3 file swap, Mp3 search engines, Mp3Pro - players, encoders, plugins