We did have a few minor issues with the CDX-GT920U's interface. Despite its large size, the mode button doesn't really do anything but toggle AM/FM bands and change the play mode of ATRAC audio devices, which makes it seem like a bit of a waste of faceplate real estate. Another minor annoyance is that the faceplate lacks a mute or attenuate button. Instead, Sony has chosen to put the mute button on the included IR remote. The whole point of the mute feature is to quickly silence the music, which would be useful if you need to suddenly take a phone call or order at a drive through; having to fumble with the remote defeats the purpose of having a mute button.
In the days before MP3, I installed a 100-disc CD changer in the trunk of my 1996 Impala SS for a cross-country trip - and I still didn't listen to all the discs by the time I reached the opposite shore. Nowadays, I can load about half of the tuneage that used to fit in that clunky changer on a finger-size USB drive, plug it into one of the new car stereos with a USB port, and cruise for days before needing a refill.
sony drive s mp3
Sony's Xplod MEX-1GP Giga Panel CD receiver ($350; sonystyle.com) takes a slightly different approach to achieve the same result: 1 gigabyte of flash memory and a USB port are built into the radio's removable faceplate. Connect the faceplate to any Windows-based PC via a supplied USB cable, transfer around 500 MP3 and WMA files, and you're good to go.
A portable media player (PMP) (also including the related digital audio player (DAP)) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files.[1][2] The data is typically stored on a compact disc (CD), Digital Video Disc (DVD), Blu-ray Disc (BD), flash memory, microdrive, or hard drive; most earlier PMPs used physical media, but modern players mostly use flash memory. In contrast, analogue portable audio players play music from non-digital media that use analogue media, such as cassette tapes or vinyl records.
DAPs appeared in the late 1990s following the creation of the MP3 codec in Germany. MP3-playing devices were mostly pioneered by South Korean startups, who by 2002 would control the majority of global sales.[5] However the industry would eventually be defined by the popular Apple iPod.[6] In 2006, 20% of Americans owned a PMP a figure strongly driven by the young, as more than half (54%) of American teens owned one as did 30% of young adults aged 18 to 34.[7] In 2007, 210 million PMPs were sold worldwide, worth $19.5 billion.[8] In 2008 video-enabled players would overtake audio-only players.[9] Increasing sales of smartphones and tablet computers have led to a decline in sales of PMPs,[10][11] leading to most devices being phased out, such as the iPod Touch on May 10, 2022, though certain flagship devices like the Sony Walkman are still in production. Portable DVD and BD players are still manufactured.[12]
MP3 was introduced as an audio coding standard in 1994. It was based on several audio data compression techniques, including the modified discrete cosine transform (MDCT), FFT and psychoacoustic methods.[30] The first portable MP3 player was launched in 1997 by Saehan Information Systems,[31] which sold its "MPMan F10" player in parts of Asia in spring 1998.[32][33] In mid-1998, the South Korean company licensed the players for North American distribution to Eiger Labs, which rebranded them as the EigerMan F10 and F20.[34] The flash-based players were available in 32 MB or 64 MB (6 or 12 songs) storage capacity and had a LCD screen to tell the user the song currently playing. The first car audio hard drive-based MP3 player was also released in 1997 by MP32Go and was called the MP32Go Player. It consisted of a 3 GB IBM 2.5" hard drive that was housed in a trunk-mounted enclosure connected to the car's radio system. It retailed for $599 and was a commercial failure.[35]
Other early MP3 portables include Sensory Science's Rave MP2100, the I-Jam IJ-100, the Creative Labs Nomad and the RCA Lyra. These portables were small and light, but had only enough memory to hold around 7 to 20 songs at normal 128 kbit/s compression rates. They also used slower parallel port connections to transfer files from PC to player, necessary as most PCs then used the Windows 95 and NT operating systems, which did not have native support for USB connections. As more users migrated to Windows 98 by 2000, most players transitioned to USB. In 1999 the first hard drive based DAP using a 2.5" laptop drive was made, the Personal Jukebox (PJB-100) designed by Compaq and released by Hango Electronics Co with 4.8 GB storage, which held about 1,200 songs, and invented what would be called the jukebox segment of digital music portables.[40] This segment eventually became the dominant type of digital music player.
Sony entered the digital audio player market in 1999 with the Vaio Music Clip and Memory Stick Walkman, however they were technically not MP3 players as it did not support the MP3 format but instead Sony's own ATRAC format and WMA. The company's first MP3-supporting Walkman player did not come until 2004.[43] The new Walkman players were originally referred to as "Network Walkman", with the introduction of the NW-MS7. This DAP plays audio files using ATRAC compression stored on a removable Memory Stick.[44] Over the years, various hard-drive-based and flash-based DAPs and PMPs have been released under the Walkman range, albeit MP3 support only came in 2004.
Designed by Samsung Electronics, the Samsung YEPP line were first released in 1999 with the aim of making the smallest music players on the market.[45] In 2000, Creative released the 6GB hard drive based Creative NOMAD Jukebox. The name borrowed the jukebox metaphor popularised by Remote Solution, also used by Archos. Later players in the Creative NOMAD range used microdrives rather than laptop drives. In October 2000, South Korean software company Cowon Systems released their first MP3 player, the CW100, under the brand name iAUDIO. Since then the company has released many different players. In December 2000, some months after the Creative's NOMAD Jukebox, Archos released its Jukebox 6000 with a 6GB hard drive. Philips also released a player called the Rush.[46]
Modular MP3 keydrive players are composed of two detachable parts: the head (or reader/writer) and the body (the memory). They can be independently obtained and upgradable (one can change the head or the body; i.e. to add more memory).
On 23 October 2001, Apple Computer unveiled the first generation iPod, a 5 GB hard drive based DAP with a 1.8" hard drive and a 2" monochrome display. With the development of a spartan user interface and a smaller form factor, the iPod was initially popular within the Macintosh community. In July 2002, Apple introduced the second generation update to the iPod, which was compatible with Windows computers through Musicmatch Jukebox. iPods quickly became the most popular DAP product and led the fast growth of this market during the early and mid 2000s.
In 2002, Archos released the first "portable media player" (PMP), the Archos Jukebox Multimedia[47] with a little 1.5" colour screen. Manufacturers have since implemented abilities to view images and play videos into their devices. The next year, Archos released another multimedia jukebox, the AV300, with a 3.8" screen and a 20GB hard drive. In the same year, Toshiba released the first Gigabeat. In 2003, Dell launched a line of portable digital music players called Dell DJ. They were discontinued by 2006.[48]
In 2007, Apple introduced the iPod Touch, the first iPod with a multi-touch screen. Some similar products existed before such as the iriver clix in 2006. In South Korea, sales of MP3 players peaked in 2006, but started declining afterwards. This was driven partly by the launch of mobile television services (DMB), which along with increased demand of movies on the go led to a transition away from music-only players to PMPs.[52] By 2008, more video-enabled PMPs were sold than audio-only players.[9]
Many mobile digital media players have last position memory, in which when it is powered off, a user doesn't have to worry about starting at the first track again, or even hearing repeats of others songs when a playlist, album, or whole library is cued for shuffle play, in which shuffle play is a common feature, too. Early playback devices to even remotely have "last position memory" that predated solid-state digital media playback devices were tape-based media, except this kind suffered from having to be "rewound", whereas disc-based media suffered from no native "last position memory", unless disc-players had their own last position memory. However, some models of solid-state flash memory (or hard drive ones with some moving parts) are somewhat the "best of both worlds" in the market.
PMPs were earlier packaged with an installation CD/DVD that inserts device drivers (and for some players, software that is capable of seamlessly transferring files between the player and the computer). For later players, however, these are usually available online via the manufacturers' websites, or increasingly natively recognised by the operating system through Universal Mass Storage (UMS) or Media Transfer Protocol (MTP).
As with DAPs, PMPs come in either flash or hard disk storage. Storage capacities have reached up to 64 GB for flash memory based PMPs, first reached by the 3rd Generation iPod Touch, and up to 1 TB for hard disk drive PMPs, first achieved by the Archos 5 Internet Tablet.
Digital sampling is used to convert an audio wave to a sequence of binary numbers that can be stored in a digital format, such as MP3. Common features of all MP3 players are a memory storage device, such as flash memory or a miniature hard disk drive, an embedded processor, and an audio codec microchip to convert the compressed file into an analogue sound signal. During playback, audio files are read from storage into a RAM based memory buffer, and then streamed through an audio codec to produce decoded PCM audio. Typically audio formats decode at double to more than 20 times real speed on portable electronic processors,[73] requiring that the codec output be stored for a time until the DAC can play it. To save power, portable devices may spend much or nearly all of their time in a low power idle state while waiting for the DAC to deplete the output PCM buffer before briefly powering up to decode additional audio. 2ff7e9595c
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