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The 8-track tape (formally Stereo 8; commonly called eight-track cartridge, eight-track tape, and eight-track) is a magnetic-tape sound recording technology that was popular [2] from the mid-1960s until the early 1980s, when the compact cassette, which pre-dated the 8-track system, surpassed it in popularity for pre-recorded music.
The first boombox was developed by the inventor of the audio compact cassette, Philips of the Netherlands.Their first 'Radiorecorder' was released in 1966. The Philips innovation was the first time that radio broadcasts could be recorded onto cassette tapes without the cables or microphones that previous stand-alone cassette tape recorders required.
A portable media player (PMP) or digital audio player (DAP) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files.
The compact cassette format, however, was initially designed for dictation and portable use, and the audio quality of early players was not well-suited for music. In 1971, the Advent Corporation introduced their Model 201 tape deck that combined Dolby type B noise reduction and chromium(IV) oxide (CrO 2 ) tape, with a commercial-grade tape ...
PSR-GX76 (2000, export model, with Portable Grand) PSR-K1 (6 February 2003, with Karaoke function and built-in microphone) PSR-F50/PSR-F51/PSR-F52;
An early portable player, a Sony Discman model D-121. A portable CD player is a portable audio player used to play compact discs. Portable CD players are powered by batteries and they have a 1/8" headphone jack into which the user plugs a pair of headphones. The first portable CD player released was the D-50 by Sony. [58]
Sony's MiniDisc was one of two rival digital systems introduced in 1992 that were intended to replace the Philips Compact Cassette analog audio tape system: the other was the Digital Compact Cassette (DCC), created by Philips and Matsushita (now Panasonic).
Philips used a variation of this technique called pulse-density modulation (PDM), [46] while Matsushita (now Panasonic) chose pulse-width modulation (PWM), advertising it as MASH, which is an acronym derived from their patented Multi-stAge noiSe-sHaping PWM topology.