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Free Lossless Audio Codec
FLAC (; Free Lossless Audio Codec) is an audio coding format An audio coding format (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio Digital audio is a representation of sound recorded in, or converted into, Digital signal (signal p ... for lossless compression Lossless compression is a class of data compression In signal processing Signal processing is an electrical engineering subfield that focuses on analysing, modifying, and synthesizing signals such as audio signal processing, sound, image p ... of digital audio Digital audio is a representation of sound recorded in, or converted into, Digital signal (signal processing), digital form. In digital audio, the sound wave of the audio signal is typically encoded as numerical Sampling (signal processing), s ..., developed by the Xiph.Org Foundation, and is also the name of the free software project producing the FLAC tools, the referen ...
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FLAC 1
FLAC (; Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, developed by the Xiph.Org Foundation, and is also the name of the free software project producing the FLAC tools, the reference software package that includes a codec implementation. Digital audio compressed by FLAC's algorithm can typically be reduced to between 50 and 70 percent of its original size and decompress to an identical copy of the original audio data. FLAC is an open format with royalty-free licensing and a reference implementation which is free software. FLAC has support for metadata tagging, album cover art, and fast seeking. History Development was started in 2000 by Josh Coalson. The bit-stream format was frozen when FLAC entered beta stage with the release of version 0.5 of the reference implementation on 15 January 2001. Version 1.0 was released on 20 July 2001. On 29 January 2003, the Xiph.Org Foundation and the FLAC project announced the incorporatio ...
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Metadata
Metadata is "data Data (; ) are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative property, qualitative or quantity, quantitative variable (research), variables about one or ... that provides information about other data", but not the content of the data, such as the text of a message or the image itself. There are many distinct types of metadata, including: * Descriptive metadata — the descriptive information about a resource. It is used for discovery and identification. It includes elements such as title, abstract, author, and keywords. * Structural metadata — metadata about containers of data and indicates how compound objects are put together, for example, how pages are ordered to form chapters. It describes the types, versions, relationships and other characteristics of digital materials. * Administrative metadata — the information to help manage a resource, like resource ty ...
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Data Compression
In signal processing Signal processing is an electrical engineering Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetis ..., data compression, source coding, or bit-rate reduction is the process of encoding information Information is processed, organised and structured data Data (; ) are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative property, qualitative or quant ... using fewer bit The bit is a basic unit of information in computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes and development of both ...s than the original representation. Any particular compression is either lossy In information techn ...
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MusikCube
musikcube is a free and open-source cross-platform, terminal-based Media player (software), audio player software and streaming server. Features musikcube is based on a modular plug-in architecture, and uses plug-ins written in C++. Plug-ins provide core functionality for audio decoding, data streaming, output device handling, metadata parsing, digital signal processing, and more. Plugins currently exist to provide support for many popular audio codecs, including MP3, MPEG-4, M4A, Ogg Vorbis, and FLAC. Internally, musikcube uses the SQLite database library for storing track and playlist metadata. There is currently no support for Digital rights management. musikcube is capable of streaming audio via an integrated server. An Android (operating system), Android client also exists, allowing music to be streamed over local and wide-area networks. Licensing musikcube (and official plugins) are licensed under the BSD licenses, BSD-3-Clause license. See also *cmus *Music Player Da ...
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Foobar2000
foobar2000 (often abbreviated as fb2k or f2k) is a freeware Audio player (software), audio player for Microsoft Windows, iOS and Android (operating system), Android developed by Peter Pawłowski. It has a Modular programming, modular design, which provides user flexibility in configuration and customization. Standard "skin" elements can be individually augmented or replaced with different dials and buttons, as well as visualizers such as waveform, oscilloscope, spectrum, spectrogram (waterfall), peak and smoothed VU meters. foobar2000 offers Third-party software component, third-party user interface modifications through a software development kit (SDK). foobar2000 supports many audio file formats, has many features for organizing metadata, files, and folders, and has a Transcoding, converter interface for use with Command-line interface, command line encoders. To maximize audio fidelity in cases where resampling (audio), resampling or downscaling in audio bit depth, bit depth ...
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XMMS
X Multimedia System (XMMS) is an audio player for Unix-like A Unix-like (sometimes referred to as UN*X or *nix) operating system An operating system (OS) is system software that manages computer hardware, computer software, software resources, and provides common daemon (computing), services for compu ... systems released under a free software license A free-software license is a notice that grants the recipient of a piece of software extensive rights to modify and software distribution, redistribute that software. These actions are usually prohibited by copyright law, but the rights-holde .... History XMMS was originally written as ''X11Amp'' by Peter and Mikael Alm in November 1997. The player was made to resemble Winamp Winamp is a for originally developed by and Dmitry Boldyrev by their company , which they later sold to in 1999 for $80 million. It was then acquired by in 2014. Since version 2 it has been sold as and supports extensibility with ...
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Winamp
Winamp is a media player for Microsoft Windows Microsoft Windows, commonly referred to as Windows, is a group of several proprietary {{Short pages monitor

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ReplayGain
ReplayGain is a proposed technical standard A technical standard is an established norm (social), norm or requirement for a repeatable technical task which is applied to a common and repeated use of rules, conditions, guidelines or characteristics for products or related processes and produc ... published by David Robinson in 2001 to measure and normalize the perceived loudness In acoustics Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is ... of audio in computer audio formatAn audio format is a medium for sound recording and reproduction In physics Physics (from grc, φυσική (ἐπιστήμη), physikḗ (epistḗmē), knowledge of nature, from ''phýsis'' 'nature'), , is the natural science that ...s such as MP3 MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio L ...
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Object-oriented
Object-oriented programming (OOP) is a programming paradigm Programming paradigms are a way to classify programming languages based on their features. Languages can be classified into multiple paradigms. Some paradigms are concerned mainly with implications for the execution model of the language, suc ... based on the concept of " objects", which can contain data Data (; ) are individual facts A fact is something that is truth, true. The usual test for a statement of fact is verifiability—that is whether it can be demonstrated to correspond to experience. Standard reference works are often used ... and code: data in the form of fields File:A NASA Delta IV Heavy rocket launches the Parker Solar Probe (29097299447).jpg, FIELDS heads into space in August 2018 as part of the ''Parker Solar Probe'' FIELDS is a science instrument on the ''Parker Solar Probe'' (PSP), designed to mea ... (often known as attributes Attribute may refer to: * Attribute (philosoph ...
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Container Format (digital)
A container format (informally, sometimes called a wrapper) or metafile is a file format A file format is a standard Standard may refer to: Flags * Colours, standards and guidons * Standard (flag), a type of flag used for personal identification Norm, convention or requirement * Standard (metrology), an object that bears ... that allows multiple data streams to be embedded into a single file File or filing may refer to: Mechanical tools and processes * File (tool) A file is a tool used to remove fine amounts of material from a workpiece. It is common in woodworking, metalworking, and other similar trade and hobby tasks. Most are ..., usually along with metadata Metadata is "data Data (; ) are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative property, qualitative or quantity, quantitative variable (research), v ... for identifying and further detailing those str ...
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Opus (codec)
Opus is a Lossy audio compression, lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently speech coding, code speech and general audio in a single format, while remaining latency (audio), low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors. Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until Transparency (data compression), transparency is reached, including MP3, Advanced Audio Coding, AAC, and High-Efficiency Advanced Audio Coding, HE-AAC. Opus combines the speech-oriented Linear predictive coding, LPC-based SILK algorithm and the lower-latency Modified discrete cosine transform, MDCT-based CELT algorithm, switching between or combining them as needed for maximal efficiency. Bitrate, audio bandw ...
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Speex
Speex is an audio compression codec specifically tuned for the reproduction of human speech and also a free software Free software (or libre software) is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty ... speech codec Speech coding is an application of data compression In signal processing Signal processing is an electrical engineering Electrical engineering is an engineering discipline concerned with the study, design, and application of equipme ... that may be used on VoIP Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia Multimedia is a form of communication that ... applications and podcast A podcast is an episodic series of digital au ...
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