A jukebox is a partially automated music-playing device, usually a coin-operated machine, that plays a patron's selection from self-contained media. The classic jukebox has buttons with letters and numbers on them, which are used to select specific records. Some may use compact discs instead. Disc changers are similar devices for home use; they are small enough to fit on a shelf and can hold up to hundreds of discs, allowing them to be easily removed, replaced, or inserted by the user.
A home cinema, also called a home theater or theater room, is a home entertainment audio-visual system that seeks to reproduce a movie theater experience and mood using consumer electronics-grade video and audio equipment and is set up in a room or backyard of a private home. Some studies show that films are rated better and generate more intense emotions when watched in a movie theater, but convenience is a major appeal for home cinemas. In the 1980s, home cinemas typically consisted of a movie pre-recorded on a LaserDisc or VHS tape; a LaserDisc Player or VCR; and a heavy, bulky large-screen cathode-ray tube TV set, although sometimes CRT projectors were used instead. In the 2000s, technological innovations in sound systems, video player equipment, TV screens and video projectors have changed the equipment used in home cinema set-ups and enabled home users to experience a higher-resolution screen image, improved sound quality and components that offer users more options. The development of Internet-based subscription services means that 2020s-era home theatre users do not have to commute to a video rental store as was common in the 1980s and 1990s.
A soundie is a three-minute American musical film displaying a performance. Soundies were produced between 1940 and 1946 and have been referred to as "precursors to music videos". Soundies exhibited a variety of musical genres in an effort to draw a broad audience. The shorts were originally viewed in public places on "Panorams": coin-operated, 16mm rear projection machines. Panorams were typically located in businesses like nightclubs, bars, and restaurants. Due to World War II, Soundies also featured patriotic messages and advertisements for war bonds. Hollywood films were censored but Soundies weren't, so the films occasionally had daring content like burlesque acts; these were produced to appeal to soldiers on leave.
A slide projector is an optical device for projecting enlarged images of photographic slides onto a screen. Many projectors have mechanical arrangements to show a series of slides loaded into a special tray sequentially.
A public address system is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music. PA systems are used in any public venue that requires that an announcer, performer, etc. be sufficiently audible at a distance or over a large area. Typical applications include sports stadiums, public transportation vehicles and facilities, and live or recorded music venues and events. A PA system may include multiple microphones or other sound sources, a mixing console to combine and modify multiple sources, and multiple amplifiers and loudspeakers for louder volume or wider distribution.
A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system. Video projectors use a very bright ultra-high-performance lamp, Xenon arc lamp, metal halide lamp, LED or solid state blue, RB, RGB or fiber-optic lasers to provide the illumination required to project the image. Most modern projectors can correct any curves, blurriness and other inconsistencies through manual settings.
Vitaphone was a sound film system used for feature films and nearly 1,000 short subjects made by Warner Bros. and its sister studio First National from 1926 to 1931. Vitaphone is the last major analog sound-on-disc system and the only one that was widely used and commercially successful. The soundtrack is not printed on the film, but issued separately on phonograph records. The discs, recorded at 33+1⁄3 rpm and typically 16 inches (41 cm) in diameter, are played on a turntable physically coupled to the projector motor while the film is projected. Its frequency response is 4300 Hz. Many early talkies, such as The Jazz Singer (1927), used the Vitaphone system. The name "Vitaphone" derived from the Latin and Greek words, respectively, for "living" and "sound".
Scopitone is a type of jukebox featuring a 16 mm film component. Scopitone films were a forerunner of music videos. The 1959 Italian Cinebox/Colorama and Color-Sonics were competing, lesser-known technologies of the time one year before the Scopitone in France.
Sound-on-film is a class of sound film processes where the sound accompanying a picture is recorded on photographic film, usually, but not always, the same strip of film carrying the picture. Sound-on-film processes can either record an analog sound track or digital sound track, and may record the signal either optically or magnetically. Earlier technologies were sound-on-disc, meaning the film's soundtrack would be on a separate phonograph record.
A pentode is an electronic device having five electrodes. The term most commonly applies to a three-grid amplifying vacuum tube or thermionic valve that was invented by Gilles Holst and Bernhard D.H. Tellegen in 1926. The pentode was developed from the screen-grid tube or shield-grid tube by the addition of a grid between the screen grid and the plate. The screen-grid tube was limited in performance as an amplifier due to secondary emission of electrons from the plate. The additional grid is called the suppressor grid. The suppressor grid is usually operated at or near the potential of the cathode and prevents secondary emission electrons from the plate from reaching the screen grid. The addition of the suppressor grid permits much greater output signal amplitude to be obtained from the plate of the pentode in amplifier operation than from the plate of the screen-grid tube at the same plate supply voltage. Pentodes were widely manufactured and used in electronic equipment until the 1960s to 1970s, during which time transistors replaced tubes in new designs. During the first quarter of the 21st century, a few pentode tubes have been in production for high power radio frequency applications, musical instrument amplifiers, home audio and niche markets.
The Movietone sound system is an optical sound-on-film method of recording sound for motion pictures, ensuring synchronization between sound and picture. It achieves this by recording the sound as a variable-density optical track on the same strip of film that records the pictures. The initial version of this system was capable of a frequency response of 8500 Hz. Although modern sound films use variable-area tracks instead, modern motion picture theaters can play a Movietone film without modification to the projector. Movietone was one of four motion picture sound systems under development in the U.S. during the 1920s. The others were DeForest's Phonofilm, Warner Brothers' Vitaphone, and RCA Photophone. However, Phonofilm was principally an early version of Movietone.
Reg Kehoe and his Marimba Queens was a marimba-based musical group active from the late 1930s to the mid-1950s. They were based in Lancaster, Pennsylvania and toured extensively.
The Mills Novelty Company, Incorporated of Chicago was once a leading manufacturer of coin-operated machines, including slot machines, vending machines, and jukeboxes, in the United States. Between about 1905 and 1930, the company's products included the Mills Violano-Virtuoso and its predecessors, celebrated machines that automatically played a violin and, after about 1909, a piano. By 1944, the name of the company had changed to Mills Industries, Incorporated. The slot machine division was then owned by Bell-O-Matic Corporation. By the late 1930s, vending machines were being installed by Mills Automatic Merchandising Corporation of New York.
The Atari Video Music is the earliest commercial electronic music visualizer released. It was manufactured by Atari, Inc., and released in 1977 for $169.95. The system creates an animated visual display that responds to musical input from a Hi-Fi stereo system for the visual entertainment of consumers.
Auricon cameras were 16 mm film Single System sound-on-film motion picture cameras manufactured in the 1940s through the early 1980s. Auricon cameras are notable because they record sound directly onto an optical or magnetic track on the same film that the image is photographed on, thus eliminating the need for a separate audio recorder. The camera preceded ENG video cameras as the main AV tool of television news gathering due to its portability–and relatively quick production turn-around–where processed negative film image could be broadcast by electronically creating a positive image. Additionally, the Auricon found studio use as a 'kinescope' camera of live video off of a TV screen, but only on early pre-NTSC line-locked monochrome systems.
Gloria Parker was an American musician and bandleader who had a radio show during the big band era. The Gloria Parker Show was broadcast nightly from 1950 to 1957, coast to coast on WABC. She played the marimba, organ, and singing glasses. Dubbed Princess of the Marimba, she conducted the 21-piece Swingphony from the Kelly Lyceum Ballroom in Buffalo, New York. This was the largest big band led by a female bandleader. Edgar Battle and Walter Thomas were arrangers for the Swingphony.
The Seeburg 1000 Background Music System is a phonograph designed and built by the Seeburg Corporation to play background music from special 162⁄3 RPM vinyl records in offices, restaurants, retail businesses, factories and similar locations. Seeburg provided a service similar to that of Muzak.
The following timeline tables list the discoveries and inventions in the history of electrical and electronic engineering.
The Scotiabank Theatre Toronto is a major movie theatre at the RioCan Hall in the Entertainment District of downtown Toronto, Ontario, Canada at Richmond and John Street owned by Cineplex Entertainment for the building and the lands owned by RioCan. Opened in 1999, the venue screens theatrical films throughout the year, but is best known as one of the major venues for the annual Toronto International Film Festival alongside the nearby TIFF Lightbox.
William Forest Crouch was an American motion picture producer, director, writer, and film editor of the 1940s. He is best known for his Soundies musicals filmed for coin-operated movie jukeboxes, and for a few musical features with all-African-American casts, such as Reet, Petite, and Gone (1947).
