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FLAC (/ f l æ k /; 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.
Plus (formerly Plus GSM) is the brand name of Poland's mobile phone network operator, Polkomtel Sp. z o.o. The company is entirely owned by Cyfrowy Polsat S.A. and is part of Grupa Polsat Plus. It operates GSM (900/1800 MHz), UMTS , LTE , 5G NR (2600 MHz TDD) and WLAN networks in Poland.
Audio file icons of various formats. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression.
The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint.
An audio coding format [1] (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio (such as in digital television, digital radio and in audio and video files). Examples of audio coding formats include MP3, AAC, Vorbis, FLAC, and Opus.
AAC is a wideband audio coding algorithm that exploits two primary coding strategies to dramatically reduce the amount of data needed to represent high-quality digital audio: Signal components that are perceptually irrelevant are discarded. Redundancies in the coded audio signal are eliminated.
MPEG-1 Audio Layer II is the audio format used in Digital Audio Broadcast (DAB), a digital radio standard for broadcasting digital audio radio services in many countries around the world. The BBC Research & Development department states that at least 192 kbit/s is necessary for a high fidelity stereo broadcast:
The iTunes Store accessed via a mobile phone, showing Pink Floyd's eighth studio album The Dark Side of the Moon (1973). A music download is the digital transfer of music via the Internet into a device capable of decoding and playing it, such as a personal computer, portable media player, MP3 player or smartphone.