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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.
Shortly after its initial launch, HDtracks began offering higher sample-rate and bit-rate recordings such as 96 kHz/24bit, 192 kHz/24bit and other sound files with higher resolution than a CD, with a focus on jazz, classical music, soft rock, and historic recordings targeting adult consumers looking for an alternative to lesser-quality ...
ALAC supports up to 8 channels of audio at 16, 20, 24 and 32 bit depth with a maximum sample rate of 384 kHz. ALAC data is frequently stored within an MP4 container with the filename extension.m4a. This extension is also used by Apple for lossy AAC audio data in an MP4 container (same container, different audio encoding).
And with a catalog of over 100 million titles, they provide a veritable bottomless well of music, all in the lossless, hi-res FLAC format with a sample rate of up to 24-bit/192kHZ.
Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray and compatible hardware. Dolby TrueHD, along with Dolby Digital Plus (E-AC-3) and Dolby AC-4, is one of the intended successors to the Dolby Digital (AC-3) lossy surround format.
DTS-HD MA can store up to 8 discrete channels of audio (7.1 surround) at up to a 24 bit sample depth and 192 kHz sampling frequency (96 kHz for 6.1 or 7.1 surround). [2] Although DTS-HD MA, and the related DTS-HD, allow virtually any number of channels in the abstract, [ 3 ] these limits are imposed for practical reasons of limited storage and ...
Streamed music is available in MP3 at 320 kbit/s, CD-DA quality lossless (16-bit/44.1 kHz) [5] and hi-resolution quality lossless (up to 24-bit/192 kHz) for some tracks. [6] 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 ...
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.