Some context: A synthesizer (often abbreviated as synth, also spelled synthesiser) is an electronic musical instrument that generates electric signals that are converted to sound through instrument amplifiers and loudspeakers or headphones. Synthesizers may either imitate traditional musical instruments like piano, Hammond organ, flute, vocals; natural sounds like ocean waves, etc.; or generate novel electronic timbres. They are often played with a musical keyboard, but they can be controlled via a variety of other input devices, including music sequencers, instrument controllers, fingerboards, guitar synthesizers, wind controllers, and electronic drums. Synthesizers without built-in controllers are often called sound modules, and are controlled via USB, MIDI or CV/gate using a controller device, often a MIDI keyboard or other controller.
In the 1970s, electronic music composers such as Jean Michel Jarre, Vangelis and Isao Tomita, released successful synthesizer-led instrumental albums. Over time, this helped influence the emergence of synthpop, a subgenre of new wave, from the late 1970s to the early 1980s. The work of German krautrock bands such as Kraftwerk and Tangerine Dream, British acts such as John Foxx, Gary Numan and David Bowie, African-American acts such as George Clinton and Zapp, and Japanese electronic acts such as Yellow Magic Orchestra and Kitaro, were influential in the development of the genre. Gary Numan's 1979 hits "Are 'Friends' Electric?" and "Cars" made heavy use of synthesizers. OMD's "Enola Gay" (1980) used distinctive electronic percussion and a synthesized melody. Soft Cell used a synthesized melody on their 1981 hit "Tainted Love". Nick Rhodes, keyboardist of Duran Duran, used various synthesizers including the Roland Jupiter-4 and Jupiter-8.  Chart hits include Depeche Mode's "Just Can't Get Enough" (1981), The Human League's "Don't You Want Me" and Giorgio Moroder's Take My Breath Away (1986) for Berlin. Other notable synthpop groups included New Order, Visage, Japan, Men Without Hats, Ultravox, Spandau Ballet, Culture Club, Eurythmics, Yazoo, Thompson Twins, A Flock of Seagulls, Heaven 17, Erasure, Soft Cell, Pet Shop Boys, Bronski Beat, Kajagoogoo, ABC, Naked Eyes, Devo, and the early work of Tears for Fears and Talk Talk. Giorgio Moroder, Brian Eno, Phil Collins, Howard Jones, Stevie Wonder, Peter Gabriel, Thomas Dolby, Kate Bush, Enya, Mike Oldfield, Donal Lunny, Frank Zappa and Todd Rundgren all made use of synthesizers.  The synthesizer became one of the most important instruments in the music industry.
is it still popular today?
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Some context: Mohanlal Viswanathan was born in the village of Elanthoor in the Pathanamthitta district on 21 May 1960. He is the youngest child of Viswanathan Nair, a former bureaucrat and law secretary with the Kerala Government, and Santhakumari. He grew up at Mudavanmugal, Poojappura, at his paternal house in Thiruvananthapuram. Mohanlal studied at Government Model Boys Higher Secondary School, Thiruvananthapuram and graduated with a Bachelor of Commerce degree from Mahatma Gandhi College in Thiruvananthapuram.
Mohanlal made his acting debut in 1978 with the film Thiranottam, which was produced and made by Mohanlal and his friends--Maniyan Pilla Raju, Suresh Kumar, Unni, Priyadarshan, Ravi Kumar and a few others. Mohanlal played Kuttappan, a mentally disabled servant. Due to some issues with censorship, the film was not released on time. It took 25 years to release the film.  In 1980, Mohanlal was cast in the lead antagonist role in Manjil Virinja Pookkal - the directorial debut of Fazil. The film became a major success. Mohanlal's friends had sent his application in response to an advertisement released by Navodaya Studio. He auditioned for the role in front of a panel that included professional directors. Displeased with his appearance, two of them gave him poor marks, but Fazil and Jijo Appachan gave him 90 and 95 marks out of 100. In an interview with Reader's Digest in 2004, Mohanlal said that his looks as a young man might have fit the villain's image.  By 1983, Mohanlal was credited in more than 25 feature films, most of them had him playing negative (villain) roles. Films such as Ente Mohangal Poovaninju, Iniyengilum, Visa, Attakkalasham, Kaliyil Alpam Karyam, Ente Mamattukkuttiyammakku, Engane Nee Marakkum, Unaru and Sreekrishna Parunthu changed his image. Through Sasikumar's Ivide Thudangunnu, he became a successful hero with a "good heart". Mohanlal played his first comic lead role in an ensemble cast in the 1984 comedy Poochakkoru Mookkuthi, directed by Priyadarshan, as a young man in love with a girl whom he mistakenly believes to be rich. It also marked the beginning of the Mohanlal-Priyadarshan duo, who as of 2016, have worked together in 44 films.  In 1985, he recorded a song for the film Onnanam Kunnil Oradi Kunnil. Uyarangalil, Nokketha Doorathu Kannum Nattu, Boeing Boeing and Aram + Aram = Kinnaram were some of his films in this period.
did he have any films that garnered positive reviews during this time period?
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