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Adapted from the Web page: AutoZen generates sounds meant to cause the user's brain waves to shift to a different dominant frequency, resulting in an altered state of consciousness. If you are under treatment for any psychiatric or neurological disorder, you might want to approach this with caution. You must use headphones for AutoZen to work at all. The effect depends on each ear receiving a different tone, and the combination of the inputs in the brain. If you are deaf in one ear, it will not work.

[From the EsounD website:] [W]hen two or more applications want to play sounds at the same time, it's on a first-come, first-served basis. Whoever gets to the audio device first wins. EsounD changes all of that... The Enlightened Sound Daemon mixes several audio streams for playback by a single audio device. You can also pre-load samples, and play them back without having to send all the data for the sound. Network transparency is also built in, so you can play sounds on one machine, and listen to them on another.

forked-daapd is a DAAP (iTunes), MPD (Music Player Daemon) and RSP (Roku) media server. It is a complete rewrite of mt-daapd (Firefly Media Server). It has support for AirPlay devices/speakers, Apple Remote (and compatibles), MPD clients, Chromecast, network streaming, internet radio, Spotify and LastFM. It does not support streaming video by AirPlay nor Chromecast. DAAP stands for Digital Audio Access Protocol, and is the protocol used by iTunes and friends to share/stream media libraries over the network. RSP is Roku's own media sharing protocol. Roku are the makers of the SoundBridge devices.

MPEG Maaate (pronounce: ma:a:it) is a C++ toolkit to parse and analyse audio data in the compressed domain by analysing MPEG-1/2 Layers 1-3 audio files. It makes the encoded fields of an MPEG audio stream accessible (tier1) and provides some content analysis functions like silence detection (tier2). MPEG Maaate is designed in tiers: the first tier implements the parsing of the MPEG audio stream, the second tier implements the content analysis on the extracted field, and the third tier includes any applications that are based on the extracted content.

LASH is a session management system for JACK audio applications. It is an implementation of a proposal that originated from this discussion. Its aim is to allow you to have many different audio programs running at once, to save their setup, close them down and then easily reload the setup at some other time. LASH doesn't deal with any kind of audio data itself; it just runs programs, deals with saving/loading (arbitrary) data and connects different kinds of virtual audio ports together (currently JACK and ALSA sequencer ports). It can also be used to move entire sessions between computers, or post sessions on the Internet for download.

Opus is a totally open, royalty-free, highly versatile audio codec. It is standardized by the Internet Engineering Task Force (IETF) as RFC 6716 which incorporated technology from Skype's SILK codec and Xiph.Org's CELT codec. Opus is designed to handle a wide range of interactive audio applications, including Voice over IP, videoconferencing, in-game chat, and even live, distributed music performances. It scales from low bitrate narrowband speech at 6 kbit/s to very high quality stereo music at 510 kbit/s. Opus uses both Linear Prediction (LP) and the Modified Discrete Cosine Transform (MDCT) to achieve good compression of both speech and music.

Mutagen is a Python module to handle audio metadata. It supports FLAC, M4A, Musepack, MP3, Ogg FLAC, Ogg Speex, Ogg Theora, Ogg Vorbis, MonkeysAudio, True Audio, and WavPack audio files. All versions of ID3v2 are supported, and all standard ID3v2.4 frames are parsed. It can read Xing headers to accurately calculate the bitrate and length of MP3s. ID3 and APEv2 tags can be edited regardless of audio format. It can also manipulate Ogg streams on an individual packet/page level.

Audio::Ecasound provides perl bindings to the ecasound control interface of the ecasound program. You can use perl to automate or interact with ecasound so you don't have to turn you back on the adoring masses packed into Wembly Stadium. Ecasound is a software package designed for multitrack audio processing. It can be used for audio playback, recording, format conversions, effects processing, mixing, as a LADSPA plugin host and JACK node. Version >= 2.2.X must be installed to use this package. "SEE ALSO" for more info.

Test::Corpus::Audio::MPD will try to launch a new mpd server for testing purposes. This mpd server will then be used during POE::Component::Client::MPD or Audio::MPD tests. In order to achieve this, the module will create a fake mpd.conf file with the correct pathes (ie, where you untarred the modulE tarball). It will then check if some mpd server is already running, and stop it if the MPD_TEST_OVERRIDE environment variable is true (die otherwise). Last it will run the test mpd with its newly created configuration file.

playmidi is a small, quick midi file player using the level two sequencer of the voxware 3.0 package to play on general midi devices or FM or Gravis Ultrasound. If no files are specified, playmidi will give a short summary of usage options. If more than one file is specified, you may skip to the next file while the current one is playing by pressing your interrupt (usually control-c) key. If you invoke playmidi while it is al- ready running, it will allow you to control the currently running invoca- tion until its death, after which time all waiting invocations fight to go first.