[[Concept:Audio]]

PyTone: 'PyTone' is a music jukebox written in Python with a curses-based GUI. It provides advanced features like crossfading and multiple players, but its special emphasis is on ease of use, making PyTone ideal for parties. It supports mp3 and Ogg Vorbis internally, and mp123/mp321 and xmms with an external player. Users can search by first letter or substring. Basic mixer functionality is included.

Pyao: 'pyao' is a set of Python bindings for Xiph.org's libao, a cross-platform audio output library.

Python-Musicbrainz2: python-musicbrainz2 provides simple, object oriented access to the MusicBrainz web service. It is useful for applications like CD rippers, taggers, media players, and other tools that need music metadata.

QTau: QTau is a piano roll editor for GNU/Linux. It is designed for editing lyrics for singing synthesis and makes use of Masanori Morise's WORLD vocoder. It also support JACK-Transport as a ReWire replacement.

Qtractor: Qtractor is a MIDI/Audio multi-track sequencer application written in C++ around the Qt4 toolkit using Qt Designer. The Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI, are the main infrastructures to evolve as a fairly-featured GNU/Linux Desktop Audio Workstation GUI, especially dedicated to the personal home- studio.

QueryXmms: Query Xmms (qxmms) is a small command line application that queries XMMS about what it is currently doing. It is useful for writing scripts that react to the status of XMMS.

Quh: Quh is an audio player that cultivates many APIs into a very simple and file operations inspired framework. It aims to play everything that makes noise (including reading different text formats using speech synthesis).

Quod Libet: Quod Libet is a music player with flexible library management. Ex Falso is a library manager for users who prefer their existing music player. Rather than categorize songs only by genre, artist, and album, Quod Libet lets you sort, search and display them however you want. Additionally it supports editing music tags and metadata. It supports regular searches, regular expression searches, automatic tagging via MusicBrainz and CDDB, tag editing, album cover display, ReplayGain, multimedia keys, an OSD, and plugin support for extra functionality. Ex Falso provides the same features for library management.

Radiance: https://github.com/zbanks/radiance Radiance is video art software for VJs. It supports beat detection, animated GIFs, YouTube video, OpenGL shader effects. It is designed for live performance.

RecordMyDesktop: RecordMyDesktop is a desktop session recorder for GNU/Linux that attemps to be easy to use, yet also effective at it's primary task. As such, the program is separated in two parts; a simple command line tool that performs the basic tasks of capturing and encoding and an interface that exposes the program functionality in a usable way. The commandline tool (which essentially is recordMyDesktop), is written in C, while there are two frontends, written in python with pyGtk (gtk-recordMyDesktop) and pyQt4 (qt-recordMyDesktop). RecordMyDesktop offers also the ability to record audio through ALSA, OSS or the JACK audio server.

Rexima: 'rexima' is a curses-based interactive mixer which can also be used from the command-line. It runs on any terminal with a screen size greater than 80x24. It is intended to be a simple, general, usable mixer without all the chrome usually present in other mixers.

Rhythmbox: Rhythmbox is a music playing application for GNOME. It supports playlists, song ratings, and any codecs installed through Gstreamer.

Riot-web: Communicate the way you want with Riot - a universal secure chat app entirely under your control. Riot is for everyone, from casual chat to high powered collaboration and is built on the Matrix protocol, a standard for open, decentralised communication.

Rip: Rip is a command line-based Perl script which rips Compact Disc tracks to either Motion Picture Expert Group Layer 3 (MP3) files or Ogg Vorbis files without user intervention between the steps of ripping. It supports cdparanoia for ripping, BladeEnc, LAME, and GOGO for WAV to MP3 encoding, oggenc for WAV to Ogg Vorbis encoding and CDDB for automatic renaming of MP3 files.

RipOff CD Ripper: RipOff is a GTK+ based CD ripper for GNU/Linux (and hopefully for other Unix systems once some testing and fixing have been done) that has a simple interface, CDDB lookups, and a plugin-based encoder architecture. It attempts to appeal to those users who want a non-GNOME dependent CD ripper with a simple interface, or users who just don't like the interfaces of the other GTK+ CD rippers.

Ripit: 'ripit' is a program for ripping, encoding, and tagging MP3s, and needs no user intervention. It is a wrapper for lame, flac, oggvorbis, dagrab, cdparanoia, and others.

RipperX: RipperX is a GTK program to rip CD audio and encode mp3s. It can rip and encode in parallel and has plugins for cdparanoia, BladeEnc, Lame, GoGo, FHG (l3enc and mp3enc), XingMp3enc, 8hz-mp3, and the ISO encoder. It also has support for CDDB and ID3 tags.

Rockbox: Rockbox is free software replacement firmware for various digital music players. It also runs on top of various operating systems (GNU/Linux, Android) but that is experimental.

Rubyripper: Through multiple times ripping the same track and correcting any differences Rubyripper tries to deliver a secure rip.

SQKshout: 'SQLshout' is a Shoutcast-compatible streaming source client which uses an SQL database as a source for the song information. The goal is to create a shoutcast radio stream that can be interactive with a Web application for voting, weighted playlist generation, and song requests.

Sbcd: 'sbcd' is a curses CD player for GNU/Linux and unix, with an interface based on the ms-dos play utility that came with SoundBlaster 16's. It makes use of SDL for the cd control.

Schism Tracker: Schism Tracker is a tracked music editor that aims to match the look and feel of Impulse Tracker as closely as possible. The player code is based on the Modplug library, so it supports a wide variety of module formats.

Secret Rabbit Code: Secret Rabbit Code (aka libsamplerate) is a Sample Rate Converter for audio. One example of where such a thing would be useful is converting audio from the CD sample rate of 44.1kHz to the 48kHz sample rate used by DAT players. SRC is capable of arbitrary and time varying conversions; from downsampling by a factor of 256 to upsampling by the same factor. Arbitrary in this case means that the ratio of input and output sample rates can be an irrational number. The conversion ratio can also vary with time for speeding up and slowing down effects.

Sfxr: sfxr is a procedural sound generator.

Shn2make: 'shn2make' works with shn audio files and the make program to automate burning CD-Rs and encoding mp3 and ogg files. It looks for an .nfo or .txt file, attempts to interpret the song names, CD listing (and other things according to the most common .nfo file formats), checks MD5 checksums, and, if everything makes sense, outputs the text of a Makefile. The output Makefile fully automates the processing of the set of shn files.

Silicon Empire: Silicon Empire can burn and copy optical discs with help of the cdrtools engine. Because the disc burner of the Silicon Empire builds on the low level layers, Silicon Empire can manage and queue overlapping burn or copy processes.

Simple Multitrack: Simple Multitrack is a set of programs that allow the simultaneous recording of an audio track while listening to a monitor mix of other tracks. It is software for the command line.

SimpleScreenRecorder: SimpleScreenRecorder is a graphical tool that lets you record videos, with or without sound, of your desktop, of your games… It can record in various formats, with different quality settings.

SlimServer: 'SlimServer' provides an elegant and easy to use interface for music playback in many audio formats. It supports Internet radio stations, playlist management, Web access, and an infrared remote control. The music remains on the host computer and streams over the network to any streaming audio client.

SnackAmp: 'SnackAmp' is a multi-platform audio file and streaming music (MP3,Ogg, wav, etc.) player and file organizer suitable for very large music collections. An integrated Web server lets users remote control the client and serve a music collection as streaming audio.

SndBite: 'SndBite' is an audio editor designed for breaking large recordings into smaller components with great efficiency. Its principal intended application is in linguistic research where it is often desirable to put each word or sentence into a separate file before further processing. Features include multiple simultaneous views of the waveform at different resolutions, the ability to position window edges at transitions between sound and silence, automated setting of cut points at zero-crossings, automatic filename generation easily controlled by the user, and optional automatic playback on window motion.

Social: GNU social gives you a powerful social network that is federated. GNU social is a social networking platform. It helps people in a community, company or group to exchange short status updates, do polls, announce events, or other social activities (and you can add more!). Users can choose which people to "follow" and receive only their friends' or colleagues' status messages. It provides a similar service to proprietary social network sites, but is much more awesome. With a little work, status messages can be sent to mobile phones, instant messenger programs (using XMPP), and specially-designed desktop clients that support the Twitter API. GNU social supports an open standard called OStatus that lets users in different networks follow each other. It enables a distributed social network spread all across the Web.

Songanizer: Songanizer is a script to organize a directory containing Ogg and MP3 files. The script accepts a list of directories in which the real Ogg and MP3 files reside. It then reads information like author, album, and genre from the files' ID3 tags and creates parallel directory structures which just contain symbolic links real files. The goal is to create virtual directory structures which give different views of the data without having redundant copies of the files themselves.

Sound Monitor: Sound Monitor is a GNOME panel applet that displays the current volume output of the Esound daemon and (optionally) the Esound status: Off(error), Standby, Ready. It remembers the volume and balance of streams and samples active within esound, and restores those values when a subsequent stream with the same id (name) connects to esound. This lets the user keep volume and balance preferences between sound playback events and sessions. An extra program, esdpvd, is included that lets users save stream volumes between sessions.

Sound Mural: Sound Mural is a command line program that provides an image to sound conversion. This can be called an inverse spectrogram.

SoundConverter: A simple sound converter application for the GNOME environment. It reads anything the GStreamer library can read, and writes WAV, FLAC, MP3, and Ogg Vorbis files.

Sox: SoX converts various formats of computer audio files into other formats. It can also apply various effects to these sound files during the conversion and play and record audio files on several *nix style platforms.

Spchcat: From GitHub: Speech recognition tool to convert audio to text transcripts for GNU/Linux. spchcat is a command-line tool that reads in audio from .WAV files, a microphone, or system audio inputs and converts any speech found into text. It runs locally on your machine, with no web API calls or network activity. It is built on top of Coqui's speech to text library, TensorFlow, KenLM, and data from Mozilla's Common Voice project.

Speex ,: The Speex project aims to build a patent-free voice codec. Unlike codecs like MP3 and Ogg Vorbis, Speex is specially designed for compressing voice at low bit-rates (in the 8-32 kbps/channel range) for applications such as voice over IP (VoIP). Other possible applications include Internet audio streaming at low bit-rate, and archiving of speech data (e.g. voice mail).

Spek: Spek is a GUI-only program for analyzing the spectrum of various audio files. It can help with detecting transcoded files and evaluating their true bit rate. It features support for all popular lossy and lossless audio file formats, fast signal processing, use of multiple threads to further speed up the analysis, display of codec name and audio signal parameters, ability to save the spectrogram as an image file, drag-and-drop support, adjustable spectral density range. auto-fitting time, frequency and spectral density rulers.

Strawberry: Strawberry is a music player and music collection organizer. It's based on Clementine with the Amarok 1.4 look and feel especially aimed at audiophiles. The name is inspired by the band Strawbs.

Strec: 'strec' is a wrapper for dsproxy, LAME, and Real Player 8. It lets you record streams as MP3s.

Submount: The submount removable media handling system automatically mounts and unmounts removable media devices such as CDROMs, DVDs, and floppy drives. It is a two part system, with a small kernel module and a userspace program. It provides the same functionality as supermount, but (hopefully) avoids supermount's stability problems.

Surge: Surge, now called Surge XT, is one of the most popular digital synths used by the free software community. In Surge, each patch contains two scenes which are separate instances of the entire synthesis engine (except effects) that can be used to create layered or split patches. It features 3 oscillators per scene, with 12 versatile oscillator algorithms (Classic, Modern, Wavetable, Window, Sine, FM2, FM3, String, Twist, Alias, S&H Noise and Audio Input), 2 filter units in 8 different configurations and 12 LFO units (6 are per voice and 6 global for the whole scene). Surge was renamed to "Surge XT" after it was entirely rewritten in JUCE.

Swami: Swami (Sampled Waveforms And Musical Instruments) is an application for editing and managing MIDI instruments, such as SoundFont files. A programming API is also provided for integration with other applications.

Sweep: A sound editor for sound samples. It operates on various PCM style files such as .wav, .aiff, and .au. Sweep contains filters and effects as well as multi-level undo and redo. It also allows discontonous selections, multiple views of a sound sample, and piano style-playback.

TCD: TCD is a CD player with an ncurses based interface.

TagLib: 'TagLib' is a library for reading and editing the metadata of several popular audio formats. It supports ID3v1 and ID3v2 for MP3 files, Ogg Vorbis comments and ID3 tags, and Vorbis comments in FLAC files. Tests have shown it to be 6 times faster than id3lib and 3 times faster than libvorbisfile at reading tags (CPU time). It supports Unicode. TagLib offers an abstraction layer that makes it easy to ignore the differences between the different file formats and their implementations. It uses KDE-style programming conventions and C++ by default, but it does not link to either Qt or Glib (it has no external dependancies at all) and does provide Glib-style C bindings (currently for the generic API only).

Tagstoo: Tag folders and files (including multimedia) by dragging the tags on them, you can create tags of various shapes and colors for a more intuitive classification. Precise search possibilities, with various input fields, allowing to add all the necessary tags that you want. For example, in one field you can add the tags cat' and 'white' and in another field you can add the tags 'dog' and 'brown', so the search result will return all white cats and brown dogs. Another more abstract example to show the available searches can be: Searh under folders that have (tag50) or (tag51 + tag52) files that have (tag1 + tag2 + tag7 + tag8) or (tag1 + tag2 + tag6 + tag9) but don't have (tag10) and (tag11). Multimedia files preview in both explorer and searcher results cards. The cover images of epubs also are shown. For images both system's default image viewer and program's new internal viewer can be launched alternatively. Usual file management actions by dragging and dropping or pressing buttons; copy, move, delete, rename. And undo button. It's possible to export/import the tagging data to a file, so data is available in any computer. Features: - Tag Folders and files easily by dragging and dropping tags created from a variety of shapes. - No installation required. Compatible with Windows, GNU/Linux and Mac OS. - Export/import data to a file. - Possible to build up very specific searches. - Various Viewmodes; from lists to cards of different sizes to preview folders and files. - Multimedia file preview in explorer/searcher. Also Epubs. - Integrated image viewer that can be launched alternatively to the system's default viewer. - Tags positions are interchangeable. - If you want a less jazzy interface you have the option to choose a 'grayscale' mode.

Tangerine: Tangerine is a music server. It uses DAAP, the same protocol iTunes uses for sharing. Features include automatic music discovery through Beagle and an easy-to-use configuration tool.

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