Free flac to mp3 software for linux

transKode is a KDE/Qt based frontend for varios audio transcoding tools.
Based on AUDIO FORMAT CONVERTER v.6 by Michael Mitton (take a look at http://www.kde-apps.org/content/show.php?content=23653)
Supported Input Formats:
- wav
- mp3 (needs lame)
- mpc (needs mppdec)
- ogg (needs oggdec)
- flac (needs flac)
- ape/mac (needs mac)
- m4a/mp4 (needs faad)
- spx (needs speexdec)
- audio formats decodable by installed gst-streamer (needs gst-launch with gst-spider plugin)
Supported Output Formats:
- wav
- mp3 (needs lame)
- mpc (needs mppenc)
- ogg (needs oggenc)
- flac (needs flac)
- ape/mac (needs mac)
- m4a/mp4 (needs faac)
- spx (needs speexenc)
- output formats for which you have gstreamer encoder plugins (needs gst-launch with wavparse plugin).

soundKonverter project is a frontend to various audio converters.
Currently supported backends are oggenc, oggdec, flac, lame, ffmpeg (partly), mplayer (partly).
With soundKonverter you can convert between various audio file formats. Supported formats are: (encode/decode)
ogg (e/d)
flac (e/d)
mp3 (e/d)
wav (e/d)
wma (d)
Known problems:
-Starting soundKonverter with arguments will fail if there is already an active instance. Use dragndrop.
-The progressbar doesnt work fine.
-Calibrating the wma decoder only works one time per reboot for me.
-some small things.
Planned features:
-Profile manager.
-More audio formats.
If you have suggestions feel free to send me a mail. My English is not very well, so feel free to send me corrections of incongruous expressions.
This app is in a very early development stage. I just thought that some guys are waiting for an application like this (me for example). Furthermore it may still take some time to finish it.
Enhancements:
- Add: Polish translation (thanks to qla)
- Add: Brazilian Portuguese translation (thanks to Leandro Santiago da Silva)
- Add: Spanish translation (thanks to Adrian Capel)
- Add: Support for ttaenc and bonk
- Add: Support for wvgain
- Fix: Show Replay Gain of flac files correctly
- Fix: Dont recalculate Replay Gain, if all files in an album show the same gain
- Fix: Some minor fixes
- Remove: Plugin update feature because my website is down

flac2mp3 project is a tool to convert audio files from flac to mp3 format.

EasyTAG is an utility for viewing and editing tags for MP3, MP2, FLAC, Ogg Vorbis, MusePack and Monkeys Audio files. EasyTAG is simple and nice GTK+ interface makes tagging easier under GNU/Linux.
The program exists for the both versions of the GTK library 1.2 and 2.4.
The GTK 1.2 version wouldnt change a lot (may be some bugs fixes), as all new developments will be concentrated on the new GTK 2.4 version.
Main features:
- View, edit, write tags of MP3, MP2 files (ID3 tag with pictures), FLAC files (FLAC Vorbis tag), Ogg Vorbis files (Ogg Vorbis tag), and MusePack, Monkeys Audio files (APE tag),
- Can edit more tag fields : Title, Artist, Album, Year, Track Number, Genre, Comment, Composer, Original Artist/Performer, Copyright, URL and Encoder name,
- Auto tagging: parse filename and directory to complete automatically the fields (using masks),
- Ability to rename files from the tag (using masks) or by loading a text file,
- Process selected files of the selected directory,
- Ability to browse subdirectories,
- Recursion for tagging, removing, renaming, saving...,
- Can set a field (artist, title,...) to all other files,
- Read file header informations (bitrate, time, ...) and display them,
- Auto completion of the date if a partial is entered,
- Undo and redo last changes,
- Ability to process fields of tag and file name (convert letters into uppercase, downcase, ...),
- Ability to open a directory or a file with an external program,
- CDDB support using Freedb.org servers (manual and automatic search),
- A tree based browser or a view by Artist & Album,
- A list to select files,
- A playlist generator window,
- A file searching window,
- Simple and explicit interface!,
- French, German, Russian, Dutch, Hungarian, Swedish, Italian, Japanese, Ukrainian, Czech, Spanish, Polish Romanian and Danish translation languages,
- Written in C and uses GTK+ 2.4 for the GUI
Enhancements:
- This release adds autoscroll in log view and the ability to change the modification time of the parent directory of a file when updating a tag (which is useful with Amarok).
- A problem with displaying the title in the cddb window and a mistake in the configure script were fixed.
- Swedish documentation was added.
- The French, German, Polish, Brazilian Portuguese, and Swedish translations were updated.

Herrie is a command line music player. It has a split-screen file manager and playlist interface and supports a number of file formats (MP3, Ogg Vorbis, wave, FLAC, etc).

Herrie also has some nice features, including a chroot() function for untrusted setups (remote logins, parties, etc). AudioScrobbler is also implemented using Curl.

RipIT is used to create MPEG-1 Layer 3 (mp3), Flac (flac) or Ogg Vorbis (ogg) audio files from an audio CD and from version 3.4 also faac (m4a). RipIT is a console based front-end (no fancy GUI here), written in perl, for these excellent programs:
- dagrab, cdparanoia or cdda2wav (tosha and cdd are also supported) for ripping the audio CD tracks (I dont know if dagrab is still up to date..., but its COOL!)
- Lame, OggVorbis, Flac or Faac for encoding the wav files to mp3, ogg, flac or m4a (find some info and links)
- CDDB_get (perl module) for CDDB retrieval (info and links).
Main features:
- Gets the Audio CD Album/Artist/Tracks information from CDDB
- Rips the Audio CD Tracks
- Encodes to flac, mp3 or ogg
- id3 tags encoded songs
- Creates an playlist (m3u) file
- Can prepare and send a CDDB submission.
Enhancements:
- Some minor bugs were fixed.
- The following options have been introduced: merge, resume, md5sum (to create MD5-sum files for each type of sound file), core (to allow several encoding processes on each machine), fpermission and dpermission (to set directory and file permissions), ghost (an experimental feature to split wavs with silence into chunks of sound), prepend and extend (to enlarge chunks of sound when split with the ghost option), and ejectcmd and ejectopt.