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MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) [4] is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg, [11] [12] with support from other digital scientists in other countries. Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended—defining ...
The following tables compare general and technical information for a variety of audio coding formats . For listening tests comparing the perceived audio quality of audio formats and codecs, see the article Codec listening test .
Comparison of digital music stores Digital music stores sell copies of digital audio, for example in MP3 and WAV file formats. Unlike music streaming services, which typically charge a monthly subscription fee to stream digital audio, digital music stores download songs to the customer's hard disk drive of their device. The customer will have the copy of the song permanently on their disk ...
Advanced Audio Coding ( AAC) is an audio coding standard for lossy digital audio compression. It was designed to be the successor of the MP3 format and generally achieves higher sound quality than MP3 at the same bit rate. [4] AAC has been standardized by ISO and IEC as part of the MPEG-2 and MPEG-4 specifications.
Learn about bit rate, the measure of data transfer speed, and its applications in digital communication and audio/video encoding.
High-resolution audio ( high-definition audio or HD audio) is a term for audio files with greater than 44.1 kHz sample rate or higher than 16-bit audio bit depth. It commonly refers to 96 or 192 kHz sample rates. However, 44.1 kHz/24-bit, 48 kHz/24-bit and 88.2 kHz/24-bit recordings also exist that are labeled HD Audio.
The Apple Lossless Audio Codec ( ALAC ), also known as Apple Lossless, or Apple Lossless Encoder ( ALE ), is an audio coding format, and its reference audio codec implementation, developed by Apple Inc. for lossless data compression of digital music. After initially keeping it proprietary from its inception in 2004, in late 2011 Apple made the codec available open source and royalty-free ...
The formats available for individually-purchased songs are WAV, AIFF, ALAC and FLAC for hi-res quality, lossless WMA for CD quality music, and MP3, standard WMA and AAC for lossy quality (at 128 kbit/s or 320 kbit/s).