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High-resolution Audio
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, there also exist 44.1 kHz/24-bit, 48 kHz/24-bit and 88.2 kHz/24-bit recordings that are labeled HD Audio. Research into high resolution audio began in the late 1980s and high resolution audio content started to become available on the consumer market in 1996. Definitions High-resolution audio is generally used to refer to music files that have a higher sampling frequency and/or bit depth than that of Compact Disc Digital Audio (CD-DA), which operates at 44.1 kHz/16-bit. The Recording Industry Association of America (RIAA), in cooperation with the Consumer Electronics Association, DEG: The Digital Entertainment Group, and The Recording Academy Producers & Engineers Wing, formulated the following definition of high-resolution aud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
44,100 Hz
In digital audio, 44,100 Hz (alternately represented as 44.1 kHz) is a common sampling frequency. Analog audio is often recorded by sampling it 44,100 times per second, and then these samples are used to reconstruct the audio signal when playing it back. The 44.1 kHz audio sampling rate is widely used due to the compact disc (CD) format, dating back to its use by Sony from 1979. History The 44.1 kHz sampling rate originated in the late 1970s with PCM adaptors, which recorded digital audio on video cassettes,Specifically U-matic cassettes notably the Sony PCM-1600 introduced in 1979 and carried forward in subsequent models in this series. This then became the basis for Compact Disc Digital Audio (CD-DA), defined in the Red Book (CD standard), Red Book standard in 1980. Its use has continued as an option in 1990s standards such as the DVD, and in 2000s, standards such as HDMI. This sampling frequency is commonly used for MP3 and other consumer audio file f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Super Audio CD
Super Audio CD (SACD) is an optical disc format for audio storage introduced in 1999. It was developed jointly by Sony and Philips Electronics and intended to be the successor to the Compact Disc (CD) format. The SACD format allows multiple audio channels (i.e. surround sound or multichannel sound). It also provides a higher bit rate and longer playing time than a conventional CD. An SACD is designed to be played on an SACD player. A ''hybrid SACD'' contains a Compact Disc Digital Audio (CDDA) layer and can also be played on a standard CD player. History The Super Audio CD format was introduced in 1999, and is defined by the ''Scarlet Book'' standard document. Philips and Crest Digital partnered in May 2002 to develop and install the first SACD hybrid disc production line in the United States, with a production capacity of up to three million discs per year. SACD did not achieve the level of growth that compact discs enjoyed in the 1980s, and was not accepted by the mai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master Quality Authenticated
Master Quality Authenticated (MQA) is a lossy audio compression format, which is used to transfer high-quality audio to a smartphone or audio device. The tech was launched in 2014 by Meridian Audio, and is now owned and licensed by MQA Ltd. MQA is a proprietary system and requires licensing fees to use. History The press launch of MQA was held in December 2014 in London, followed by the company hosting a demonstration room at the Consumer Electronics Show in Las Vegas in January 2015. The initial hardware manufacturers which offered MQA decoding were Pioneer, Onkyo, and Mytek. In May 2016, Warner Music Group signed a long-term licensing deal with MQA. The RIAA announced in May 2016 that MPEG-4 SLS and MQA were eligible to use the ''Hi-Res MUSIC'' logo on their products; the latter despite the logo being intended for ''lossless audio'' recordings. By 2017, music distribution companies ''Warner Music Group'', ''Universal Music Group'', ''Sony Music'' and ''Merlin Network'' ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LC3 (codec)
LC3 (''Low Complexity Communication Codec'') is an audio codec specified by the Bluetooth Special Interest Group (SIG) for the LE Audio audio protocol introduced in Bluetooth 5.2. It's developed by Fraunhofer IIS and Ericsson as the successor of the SBC codec. LC3 provides higher audio quality and better Packet loss concealment than SBC, G.722 and Opus, according to subjective testing by the Bluetooth Special Interest Group and ETSI. The conclusion regarding Opus is disputed as the test only included speech audio, but the comparison was made to version 1.1.4 of the reference Opus encoder, using complexity level 0 at 32kbps and relying on CELT (general audio) instead of SILK (speech); the test also did not take into account the newer version 1.2 of the Opus encoder released in 2017, where significant improvements were made to low bitrate streams. Supported systems: * Android 13 * Zephyr OS LC3plus LC3plus High Resolution mode is a codec defined by ETSI and is not compatib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LHDC (codec)
Low Latency High-Definition Audio Codec (LHDC) is an audio codec technology developed by Savitech. LHDC allows high-resolution audio streaming over Bluetooth. it is a high-quality Bluetooth codec based on the A2DP Bluetooth protocol and allows a bit-rate of up to 900 kbps compared to SBC's bit rate of 345 kbps. LHDC is an alternative to Bluetooth SIG's SBC and LC3 codecs. Its main competitors are Qualcomm's aptX-HD/aptX Adaptive and Sony's LDAC codec. Starting from Android 10, enumeration constant symbols for LHDC and LLAC are part of the Android Open Source Project, enabling every OEM to integrate this standard into their own Android devices freely. Older versions of Android require LHDC/LLAC enumeration constant symbols to be implemented by the smartphone manufacturers or Android app. Android apps with this type of LHDC support include Savitech's Hi-Res BT Player, FiiO Music, HIFIMAN Music and DA&T Audio. LHDC LHDC supports bitrates of 400/560/900 kbit/s, bit-de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LDAC (codec)
LDAC is a proprietary audio coding technology developed by Sony, which allows streaming high-resolution audio over Bluetooth connections at up to 990 kbps at 24 bit/96 kHz. It is used by various products, including headphones, earphones, smartphones, portable media players, active speakers, and home theaters. The encoder of LDAC is open-source under Apache License 2.0, so that any device can be coded to transmit LDAC streams without patent or licensing issues. The decoder design remains proprietary. Audio coding LDAC is an alternative to Bluetooth SIG's SBC codec. Its main competitors are Qualcomm's aptX-HD/ aptX Adaptive and the HWA Union/ Savitech's LHDC. LDAC combines lossy and lossless audio technology by employing a hybrid coding scheme based on the modified discrete cosine transform and Huffman coding to provide more efficient data compression. By default, LDAC audio bitrate settings are set to Best Effort, which switches between 330/660/990 kbps dependi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pono (digital Music Service)
Pono (, Hawaiian word for "proper") was a portable digital media player and music download service for high-resolution audio. It was developed by musician Neil Young and his company PonoMusic, which raised money for development and initial production through a crowd-funding campaign on Kickstarter. Production and shipments to backers started in October 2014, and shipments to the general public began in the first quarter of 2015. Pono's stated goal to present songs "as they first sound during studio recording sessions", using "high-resolution" 24-bit 192kHz audio instead of "the compressed audio inferiority that MP3s offer" received mixed reactions, with some describing Pono as a competitor to similar music service such as HDtracks, but others doubting its potential for success. In April 2017 it was announced that Pono was discontinued, and alternative plans were later abandoned. Background Writing in his book ''Waging Heavy Peace'', Young expressed concern about digital audi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neil Young
Neil Percival Young (born November 12, 1945) is a Canadian-American singer and songwriter. After embarking on a music career in Winnipeg in the 1960s, Young moved to Los Angeles, joining Buffalo Springfield with Stephen Stills, Richie Furay and others. Since the beginning of his solo career with his backing band Crazy Horse, he has released many critically acclaimed and important albums, such as ''Everybody Knows This Is Nowhere'', ''After the Gold Rush'', '' Harvest'', '' On the Beach'' and ''Rust Never Sleeps''. He was a part-time member of Crosby, Stills, Nash & Young. His guitar work, deeply personal lyrics and signature high tenor singing voice define his long career. Young also plays piano and harmonica on many albums, which frequently combine folk, rock, country and other musical genres. His often distorted electric guitar playing, especially with Crazy Horse, earned him the nickname " Godfather of Grunge" and led to his 1995 album '' Mirror Ball'' with Pear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Fidelity Pure Audio
High Fidelity Pure Audio, occasionally abbreviated as HFPA, is a marketing initiative, spearheaded by Sony Music Universal Music Group, for audio-only Blu-ray optical discs. Launched in 2013 as a potential successor to the compact disc (CD), it has been compared with DVD-Audio and SACD, which had similar aims. HFPA is encoded as 24-bit/96 kHz or 24-bit/192 kHz linear PCM ("high-resolution audio 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, there also ex ..."), optionally losslessly compressed with Dolby TrueHD or DTS-HD Master Audio. HFPA discs are compatible with existing Blu-Ray players. ''Pure Audio Blu-ray'' refers to a different initiative (but with some goals in common) launched by ''msm-studios'' in Germany in 2009. As of November 2019, Deutsche Grammophon is the most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blu-ray
The Blu-ray Disc (BD), often known simply as Blu-ray, is a digital optical disc data storage format. It was invented and developed in 2005 and released on June 20, 2006 worldwide. It is designed to supersede the DVD format, and capable of storing several hours of high-definition video (HDTV 720p and 1080p). The main application of Blu-ray is as a medium for video material such as feature films and for the physical distribution of video games for the PlayStation 3, PlayStation 4, PlayStation 5, Xbox One, and Xbox Series X. The name "Blu-ray" refers to the blue laser (which is actually a violet laser) used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs. The polycarbonate disc is in diameter and thick, the same size as DVDs and CDs. Conventional or pre-BD-XL Blu-ray Discs contain 25 GB per layer, with dual-layer discs (50 GB) being the industry standard for f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HDtracks
HDtracks is a high-resolution digital music store offering DRM-free music in multiple formats as well as cover art (and liner notes via PDF file downloads for a majority of catalog offerings) with audio CD-quality and high-definition audio master recording quality download selections. Origins and expansion The company was privately founded by David and Norman Chesky of the audiophile recording company Chesky Records, and is based in New York, NY. The service was launched on March 21, 2008, initially offering only CD-quality 44.1 kHz audio files in AIFF format from a small offering of independent record labels, including audiophile record company catalogs from Chesky Records, Reference Recordings, 2L, and blues labels like Alligator Records. Shortly after its initial launch, HDtracks began offering higher sample-rate and bit-rate recordings such as 96kHz/24bit, 192kHz/24bit and other sound files with higher resolution than a CD, with a focus on jazz, classical music, soft roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
