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Mobile Fidelity Sound Lab (MFSL, or "MoFi") is a company that produces audiophile releases of classic CDs and vinyl records. Many commercial CDs undergo dynamic range compression in order to sound "louder" when played on radio or low-end systems. Some consider this detrimental to the sound quality when reproduced on high-quality equipment. Mobile Fidelity Sound Lab releases are highly desirable due to their attention to detail concerning the audio mastering process. Some of the techniques used are half-speed mastering and pressing gold-plated CDs. MFSL also releases record albums meant to be played at 45 RPM instead of the standard 33? RPM, for better sound quality. These albums must be released on two or three discs, as less music can be held at increased speed. MFSL only acquires the license to reproduce releases for a specific time period, and because of the limited quantities produced, they are highly sought after. The Mobile Fidelity Sound Lab Philosophy Mobile Fidelity Sound Lab's ongoing quest is to deliver the foremost sounding audio entertainment software that technological innovation can provide. From our first UHQR™ vinyl LP to our latest Ultradisc UHR™ SACD, we have been and will remain a steadfast innovator in the audiophile frontier. We further believe that technological development serves best when accompanied by a profound awareness and appreciation for the elusive magic and mystery that comprises music itself. Our greatest hope is that our products will serve as conduits for ears ands souls to experience premium, pure, natural sound reproduction of diverse, pre-eminent original master recordings across the entire musical spectrum.
High Definition Compatible Digital [HDCD]
High Definition Compatible Digital, orHDCD(also known as High Definition Compact Disc) is a patented encode-decode process that endeavors to improve the sound quality of standard audio CDs. A HDCD-encoded CD usually, but not always, has the HDCD logo printed somewhere on the back cover. A relatively high-quality sound-system is required in order to take advantage of the subtle improvement that HDCD is intended to accomplish. HDCD was an early attempt by audiophiles to improve the sound-quality of CDs, while retaining backward compatibility with existing players. Although new HDCD-encoded CDs are still occasionally added to various catalogs, the format has been largely superseded by newer and more sophisticated digital audio technologies such as Super Audio CD (SACD) and DVD-Audio. HDCD® stands for High Definition Compatible Digital. It is an enhancement to regular audio CDs to effectively increase the dynamic range, resulting in better and more natural reproduction of music (both vocals and instrumental timbre). The additional dynamic range allows more low-level details to be captured in the digital recording. Regular audio CDs are based on 16-bit data word length, while those enhanced with HDCD have been encoded with effectively 20-bit data word length. Longer data word lengths provide more resolution in which to capture the nuances of intricate musical passages. The HDCD enhancement algorithm is invented and licensed by Pacific Microsonics. HDCD enhanced CDs are identified by the HDCD logo on the front and/or back cover, and are backwards compatible with non-HDCD enhanced playback equipment (you simply hear the quality of regular audio CD). As of early 2001, there are over 5,000 CD titles available with HDCD enhancement. To take advantage of HDCD enhanced audio CDs, you need a HDCD compatible DVD player or CD player. These models are identified with the same HDCD logo on their faceplate. PMI's High Definition Compatible Digital® (HDCD®) technology is a patented process used in top-end recording studios to correct the distortions found in current digital recording technology, delivering the full richness and detail of the original performance to compact disc and DVD audio. HDCD has been used in the recording of more than 5,000 CD titles, which include more than 225 Billboard Top 200 recordings and that account for more than 300 million CDs sold. PMI also licenses the HDCD decoder and filter technology to most of the world's leading audio IC manufacturers. Major consumer electronics makers employing HDCD technology include A & R Cambridge (Arcam), Denon Nippon Columbia Co. Ltd., Harman Kardon Inc., Kenwood Corp., Linn Products Ltd., Madrigal Audio Laboratories Inc., Marantz Japan Inc., Rotel, Sansui Electric Co. Ltd. and Toshiba Corp. HDCD-mastered CDs offer improved sound in standard CD players, and audio quality is improved even more in CD players equipped with HDCD playback technology.
Super Audio CD (SACD) & Hybrid SACD
Super Audio CD (SACD) The Super Audio CD (SACD) features two disc layers. One layer contains a standard version of the album that works on any CD player. The other layer includes high-resolution stereo and a 5.1 surround version of the recording that works on SACD-compatible DVD players and home theater systems. Both layers employ SACD's Direct Stream Digital (DSD) encoding process that samples the music 64 times faster than CD for unprecedented fidelity.
A Hybrid SA-CDis an SA-CD disc that can be played on regular CD players. The sound quality in that case will, in principle, not be better than that of a regular CD (though the CD-compatible layer is usually derived from the high resolution signal with SBM for better sound ... or similar words). The obvious benefit of a hybrid disc is that you don't need to replace all your CD players by SA-CD players at once. In fact you could even start collecting SA-CDs before you own an SA-CD player. Hybrid SA-CD works in a different way. Both the CD layer and the high-density layer are 'read' from the same side. The other side has a printed label, so it is easy to recognize the disc and place it correctly in the tray of the CD player. How it works? The high-density layer is partly reflective, partly transparent. At the wavelength used by regular CD layers (780 nm) the SA-CD layer is invisible so a CD player will just 'see' the CD layer. At the wavelength used for DVD and SA-CD (650 nm), the SA-CD layer is reflective.
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