A program to easily generate cue sheets for CD images with compressed, or raw (wav), audio tracks, usable, for example, in DosBox.

Cue Sheet Generator in action
A program to easily generate cue sheets for CD images with compressed, or raw (wav), audio tracks, usable, for example, in DosBox.

Cue Sheet Generator in action
Meson Player is a very convenient music player if you don’t need a GUI to control playback or manage playlists. You just run it and then forget about it. The player runs in the background. Switching tracks, volume control, loading and saving playlists, all of this is performed by using hotkeys, therefore you can control the player while working in any application.
Meson Player supports gapless playback, Last.FM, a lot of music file formats (stream and tracker), Internet radio and playlist management.
Linux / MacOS / Windows
Baudline is a time-frequency browser designed for scientific visualization of the spectral domain. Signal analysis is performed by Fourier, correlation, and raster transforms that create colorful spectrograms with vibrant detail. Conduct test and measurement experiments with the built in function generator, or play back audio files with a multitude of effects and filters. The baudline signal analyzer combines fast digital signal processing, versatile high speed displays, and continuous capture tools for hunting down and studying elusive signal characteristics.
Explore, Analyze, and Discover.

Linux / MacOS / Unix
Website
Downloads
Twitter
Wikipedia
Every month a new mystery signal is posted. Can you identify it?
KeyFinder is an open source key detection tool, for DJs interested in harmonic and tonal mixing. It’s intended to be very focused: no library management, no track suggestions, no media player. Just a fast, efficient workflow tool. It supports a huge range of codecs thanks to LibAV, and writes to metadata tags using TagLib.

www.ibrahimshaath.co.uk/keyfinder
github.com/ibsh/is_KeyFinder
AcoustID is a project providing complete audio identification service, based entirely on open source software.
It that consists of a client library for generating compact fingerprints from audio files, a large crowd-sourced database of audio fingerprints, many of which are linked to the MusicBrainz metadata database using their unique identifiers, and a web service that enables applications to quickly search the fingerprint database.
acoustid.org
Applications
Acoustic Fingerprint – Wikipedia
The purpose of beets is to get your music collection right once and for all. It catalogs your collection, automatically improving its metadata as it goes using the MusicBrainz database. Then it provides a bouquet of tools for manipulating and accessing your music.
Because beets is designed as a library, it can do almost anything you can imagine for your music collection. Via plugins, beets becomes a panacea:
- Fetch or calculate all the metadata you could possibly need: album art, lyrics, genres, tempos, ReplayGain levels, or acoustic fingerprints.
- Get metadata from MusicBrainz, Discogs or Beatport. Or guess metadata using songs’ filenames or their acoustic fingerprints.
- Transcode audio to any format you like.
- Check your library for duplicate tracks and albums or for albums that are missing tracks
- Browse your music library graphically through a Web browser and play it in any browser that supports HTML5 Audio and lots more.
Mp3Splt-project is a cross-platform utility to split mp3, ogg vorbis and native FLAC files by selecting a begin and an end time position, without decoding. It’s very useful to split large mp3, ogg vorbis or FLAC files to make smaller files or to split entire albums to obtain original tracks. If you want to split an album, you can select split points and filenames manually, you can get them automatically from CDDB (internet or a local file) or from .cue files. Also supports automatic silence splitting, which can be used to adjust cddb/cue split points. Trimming using silence detection is also available. You can extract tracks from Mp3Wrap or AlbumWrap files in few seconds.

Mixxx has everything you need to start making DJ mixes in a tight, integrated package. Whether you’re DJing your next house party, spinning at a club, or broadcasting as a radio DJ, Mixxx has what you need to do it right.

Cross-platform, extensible, multi-language, open source & skinnable freeware. Support for iTunes, MusicBrainz, ReplayGain and Traktor.
mixxx.org
Download
Manual
Wiki
Blog
Wikipedia
Github Repository
Grab yourself a nice audio interface. Plug in a microphone or a keyboard. Import audio or MIDI from your hard drive or the Freesound database. Cut, move, stretch, copy, paste, delete, align, trim, crossfade, rename, snapshot, zoom, transpose, quantize, swing, drag, drop. All with unlimited undo/redo. All in the same window.
Mix, mute, solo, fader, automate, EQ, dynamics, insert, send, pre-fader, post-fader, sync, monitor, isolate. Floating point fidelity, the most flexible mixer architecture in the industry, hundreds of plugins and external control surfaces.

ardour.org
community.ardour.org/download
Plugins
en.wikipedia.org/wiki/Ardour_(software)
fre:ac is a free open source audio converter and CD ripper with support for various popular formats and encoders. It currently converts between mp3, MP4/M4A, WMA, Ogg Vorbis, FLAC, AAC, WAV and Bonk formats.
With fre:ac you can easily rip your audio CDs to MP3 or WMA files for use with your hardware player, or convert files that do not play with other audio software. You can even convert whole music libraries retaining the folder and filename structure.
The integrated CD ripper supports the CDDB / freedb online CD database. It will automatically query song information and write it to ID3v2 or other title information tags.
Features:
- Converter for MP3, MP4/M4A, WMA, Ogg Vorbis, FLAC, AAC, WAV and Bonk formats
- Integrated CD ripper with CDDB/freedb title database support
- Portable application, install on a USB stick and take it with you
- Multi-core optimized encoders to speed up conversions on modern PCs
- Full Unicode support for tags and file names
- Easy to learn and use, still offers expert options when you need them
- Multilingual user interface available in 40 languages
- Completely free and open source without a catch

Nightingale chirps your favorite tunes! A beautiful interface with a wide range of supported audio formats, Last.fm and multi-platform support!

* A descendant of Songbird
The aim of Sonic Visualiser is to be the first program you reach for when want to study a musical recording rather than simply listen to it.
We hope Sonic Visualiser will be of particular interest to musicologists, archivists, signal-processing researchers and anyone else looking for a friendly way to take a look at what lies inside the audio file.
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www.sonicvisualiser.org
www.sonicvisualiser.org/download
www.vamp-plugins.org/download
Introduction Video