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Cassette player facts for kids

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Sony TC-RX55 cassette deck
A typical front loading consumer autoreverse hi-fi cassette deck from the late 1980s (Sony TC-RX55), featuring full electronic transport, Dolby B and C noise reduction, and HXPro dynamic headroom expansion

A cassette deck is a type of tape machine for playing and recording audio compact cassettes. Consumer electronics formerly used the term deck to distinguish them from a tape recorder, the "deck" being part of a stereo component system, while a "tape recorder" was more portable and usually had a self-contained power amplifier (and often speakers).

Although the two terms became used interchangeably, a recorder is typically thought of as a low-fidelity portable device, while a deck is considered a high fidelity component.

History

Origins

TeacTopCassetteDeck
Typical Teac top loading stereo cassette deck from mid-1970s
RadioShack-ctr-119
A typical portable desktop cassette recorder from RadioShack.

The first consumer tape recorder to employ a tape reel permanently housed in a small removable cartridge was the RCA tape cartridge, which appeared in 1958 as a predecessor to the cassette format. At that time, reel to reel recorders and players were commonly used by enthusiasts, but required large individual reels and tapes which had to be threaded by hand, making them less-accessible to the casual consumer. Both RCA and Bell Sound attempted to commercialize the cartridge format, but a few factors stalled adoption, including lower-than-advertised availability of selections in the prerecorded media catalog, delays in production setup, and a stand alone design that was not considered by audiophiles to be truly hi-fi.

The "compact cassette" (a Philips trademark) was introduced by the Philips Corporation at the Internationale Funkausstellung Berlin in 1963 and marketed as a device purely intended for portable speech-only dictation machines. The tape width was 18 inch (actually 0.15 inch, 3.81 mm) and tape speed was 1.875 inches (4.8 cm) per second, giving a decidedly non Hi-Fi frequency response and quite high noise levels.

Early recorders were intended for dictation and journalists, and were typically hand-held battery-powered devices with built-in microphones and automatic gain control on recording. Tape recorder audio-quality had improved by the mid-1970s, and a cassette deck with manual level controls and VU meters became a standard component of home high-fidelity systems. Eventually the reel-to-reel recorder was completely displaced, in part because of the usage constraints presented by their large size, expense, and the inconvenience of threading and rewinding the tape reels - cassettes are more portable and can be stopped and immediately removed in the middle of playback without rewinding. Cassettes became extremely popular for automotive and other portable music applications. Although pre-recorded cassettes were widely available, many users would combine (dub) songs from their vinyl records or cassettes to make a new custom mixtape cassette.

Most manufacturers adopted a standard top-loading format with piano key controls, dual VU meters, and slider level controls. There was a variety of configurations leading to the next standard format in the late 1970s, which settled on front-loading (see main picture) with cassette well on one side, dual VU meters on the other, and later dual-cassette decks with meters in the middle. Mechanical controls were replaced with electronic push buttons controlling solenoid mechanical actuators, though low cost models would retain mechanical controls. Some models could search and count gaps between songs.

Widespread use

Cassette decks soon came into widespread use and were designed variously for professional applications, home audio systems, and for mobile use in cars, as well as portable recorders. From the mid-1970s to the late 1990s the cassette deck was the preferred music source for the automobile. Like an 8-track cartridge, it was relatively insensitive to vehicle motion, but it had reduced tape flutter, as well as the obvious advantages of smaller physical size and fast forward/rewind capability. A major boost to the cassette's popularity came with the release of the Sony Walkman "personal" cassette player in 1979, designed specifically as a headphone-only ultra-compact "wearable" music source. Although the vast majority of such players eventually sold were not Sony products, the name "Walkman" has become synonymous with this type of device.

Cassette decks were eventually manufactured by almost every well known brand in home audio, and many in professional audio, with each company offering models of very high quality.

Performance and convenience improvements

Cassette decks reached their pinnacle of performance and complexity by the mid-1980s. Cassette decks from companies such as Nakamichi, Revox, and Tandberg incorporated advanced features such as multiple tape heads and dual capstan drive with separate reel motors. Auto-reversing decks became popular and were standard on most factory installed automobile decks.

In later years, an "auto reverse" feature appeared that allowed the deck to play (and, in some decks, record) on both sides of the cassette without the operator having to manually remove, flip, and re-insert the cassette.

By the late 1980s, thanks to such improvements in the electronics, the tape material and manufacturing techniques, as well as dramatic improvements to the precision of the cassette shell, tape heads and transport mechanics, sound fidelity on equipment from the top manufacturers far surpassed the levels originally expected of the medium. On suitable audio equipment, cassettes could produce a very pleasant listening experience. High-end cassette decks could achieve 15 Hz-22 kHz±3 dB frequency response with wow and flutter below 0.022%, and a signal-to-noise ratio of up to 61 dB (for Type IV tape, without noise-reduction) . With noise reduction typical signal-to-noise figures of 70-76 dB with Dolby C, 80-86 dB with Dolby S, and 85 - 90 dB with dbx could be achieved. Many casual listeners could not tell the difference between compact cassette and compact disc.

From the early 1980s, the fidelity of prerecorded cassettes began to improve dramatically. Whereas Dolby B was already in widespread use in the 1970s, prerecorded cassettes were duplicated onto rather poor quality tape stock at (often) high speed and did not compare in fidelity to high-grade LPs. However, systems such as XDR, along with the adoption of higher-grade tape (such as chromium dioxide, but typically recorded in such a way as to play back at the normal 120 μs position), and the frequent use of Dolby HX Pro, meant that cassettes became a viable high-fidelity option, one that was more portable and required less maintenance than records. In addition, cover art, which had generally previously been restricted to a single image of the LP cover along with a minimum of text, began to be tailored to cassettes as well, with fold-out lyric sheets or librettos and fold-out sleeves becoming commonplace.

Some companies, such as Mobile Fidelity, produced audiophile cassettes in the 1980s, which were recorded on high-grade tape and duplicated on premium equipment in real time from a digital master. Unlike audiophile LPs, which continue to attract a following, these became moot after the Compact Disc became widespread.

Almost all cassette decks have an MPX filter to improve the sound quality and the tracking of the noise reduction system when recording from a FM stereo broadcast. However, in many especially cheaper decks, this filter cannot be disabled, and because of that record/playback frequency response in those decks typically is limited to 16 kHz. In other decks, the MPX filter can be switched off or on independently from the Dolby switch. On yet other decks, the filter is off by default, and an option to switch it on or off is only provided when Dolby is activated; this prevents the MPX filter from being used when it's not required.

In-car entertainment systems

A key element of the cassette's success was its use in in-car entertainment systems, where the small size of the tape was significantly more convenient than the competing 8-track cartridge system. Cassette players in cars and for home use were often integrated with a radio receiver, and the term "casseiver" was occasionally used for combination units for home use. In-car cassette players were the first to adopt automatic reverse ("auto-reverse") of the tape direction at each end, allowing a cassette to be played endlessly without manual intervention. Home cassette decks soon added the feature. In Car cassette players are preferred by some particularly for their cheaper cost and serviceability.

Cassette tape adaptors have been developed which allow newer media players to be played through existing cassette decks, in particular those in cars which generally do not have input jacks. These units do not suffer from reception problems from FM transmitter based system to play back media players through the FM radio, though supported frequencies for FM transmitters that aren't used on commercial broadcasters in a given region (e.g. any frequency below 88.1 in the US) somewhat eliminates that problem.

Maintenance

Cassette equipment needs regular maintenance, as cassette tape is a magnetic medium which is in physical contact with the tape head and other metallic parts of the recorder/player mechanism. Without such maintenance, the high frequency response of the cassette equipment will suffer.

One problem occurs when iron oxide (or similar) particles from the tape itself become lodged in the playback head. As a result, the tape heads will require occasional cleaning to remove such particles. The metal capstan and the rubber pinch roller can become coated with these particles, leading them to pull the tape less precisely over the head; this in turn leads to misalignment of the tape over the head azimuth, producing noticeably unclear high tones, just as if the head itself were out of alignment.

The heads and other metallic components in the tape path (such as spindles and capstans) may become magnetized with use, and require degaussing.

Isopropyl alcohol and ethyl alcohol are both suitable head-cleaning fluids. (Rubbing alcohol may contain oil which is not suitable.) Head cleaning fluid is a relatively expensive way to buy isopropyl alcohol.

Decline in popularity

Analog cassette deck sales were expected to decline rapidly with the advent of the compact disc and other digital recording technologies such as digital audio tape (DAT), MiniDisc, and the CD-R recorder drives. Philips responded with the digital compact cassette, a system which was backward-compatible with existing analog cassette recordings for playback, but it failed to garner a significant market share and was withdrawn. One reason proposed for the lack of acceptance of digital recording formats such as DAT was a fear by content providers that the ability to make very high quality copies would hurt sales of copyrighted recordings.

The rapid transition was not realized and CDs and cassettes successfully co-existed for nearly 20 years. A contributing factor may have been the inability of early CD players to reliably read discs with surface damage and offer anti-skipping features for applications where external vibration would be present, such as automotive and recreation environments. Early CD playback equipment also tended to be expensive compared to cassette equipment of similar quality and did not offer recording capability. Many home and portable entertainment systems supported both formats and commonly allowed the CD playback to be recorded on cassette tape. The rise of inexpensive all-solid-state portable digital music systems based on MP3, AAC and similar formats finally saw the eventual decline of the domestic cassette deck. Tascam, Marantz, Yamaha, Teac, Denon, Sony, and JVC are among the companies still manufacturing cassette decks in relatively small quantities for professional and niche market use. By the late 1990s, automobiles were offered with entertainment systems that played both cassettes and CDs. By the end of the late 2000s, very few cars were offered with cassette decks. As radios became tightly integrated into dashboards, many cars lacked even standard openings that would accept aftermarket cassette player installations.

Denon-dr-m11-1

Despite the decline in the production of cassette decks, these products are still valued by some. Many blind and elderly people find the newest digital technologies very difficult to use compared to the cassette format. Cassette tapes are not vulnerable to scratching from handling (though the exposed magnetic tape is vulnerable to stretching from poking), and play from where they were last stopped (though some modern MP3 players offer savestating electronically). Cassette tapes can also be recorded multiple times (though some solid-state digital recorders are now offering that function).

Today, cassette decks are not considered by most people to be either the most versatile or highest fidelity sound recording devices available, as even very inexpensive CD or digital audio players can reproduce a wide frequency range with no speed variations. Many current budget-oriented cassette decks lack a tape selector to set proper bias and equalization settings to take best advantage of the extended high end of Type II [High Bias] and Type IV [Metal Bias] tapes.

Cassettes remain popular for audio-visual applications. Some CD recorders, particularly those intended for business use, incorporate a cassette deck to allow both formats for recording meetings, church sermons and books on tape.

A cassette player (or cassette deck) is a device what can play audio cassettes. Some players also can record music or other sounds to cassette. If a microphone is built in, there is no need for a separate microphone but in that case the quality of sound may not be so good.

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