Gracenote, Inc. provides music, video and sports metadata and automatic content recognition (ACR) technologies to entertainment services and companies, worldwide.
 Gracenote's music recognition technologies compare digital music files to a worldwide database of music information, enabling digital audio devices to identify songs.
 The company licenses its technologies to developers of consumer electronics devices and online media players, who integrate the technologies into media players, home and car stereos, and digital music devices.
 The company operates five businesses: Music, Video, Sports, Automotive and Video Personalization.
 Headquartered in Emeryville, California, the company employs approximately 1,700 people in 20 offices around the world.
 Gracenote is now a Nielsen company.
JBL is an American audio electronics company founded in 1946 by James Bullough Lansing, after whom the company was named.
 Their primary products are loudspeakers and associated electronics.
 There are two independent divisions within the company — JBL Consumer and JBL Professional.
 The former produces audio equipment for the consumer home market while the latter produces professional equipment for the studio, installed sound, tour sound, portable sound (production and DJ), and cinema markets.
A CD player is an electronic device that plays audio compact discs, which are a digital optical disc data storage format.
 CD players were first sold to consumers in 1982.
 CDs typically contain recordings of audio material such as music.
 CD players are often a part of home stereo systems, car audio systems, and personal computers. With the exception of CD boomboxes, most CD players do not produce sound by themselves.
 Most CD players only produce an output signal via a headphone jack and/or RCA jacks.
 To listen to music using a CD player with a headphone output jack, the user plugs headphones or earphones into the headphone jack.
 To use a CD player in a home stereo system, the user connects an RCA cable to the RCA jacks or other outputs and connects it to a hi-fi (or other amplifier) and loudspeakers for listening to music.
 They are also manufactured as portable devices, which are battery powered and typically used with headphones.
Astell&Kern (stylized as Astell Kern) is a South Korean consumer electronics company founded in October 2013, and is wholly owned by Iriver.
 The company manufactures media players, CD players, headphones, and home theater products.
Professional audio, abbreviated as pro audio, refers to both an activity and a category of high quality, studio-grade audio equipment.
 Typically it encompasses sound recording, sound reinforcement system setup and audio mixing, and studio music production by trained sound engineers, audio engineers, record producers, and audio technicians who work in live event support and recording using audio mixers, recording equipment and sound reinforcement systems.
 In contrast, consumer audio equipment is a lower grade of gear which is used by regular people for the reproduction of sound in a private home on a home stereo or home cinema system.
Digital media players (DMP) are home entertainment consumer electronics devices first introduced in 2000 that can connect to a home network to stream digital media (such as digital music, digital photos, or digital video).
 They should not be confused with portable media players (also known as mobile media players), which are portable consumer electronics devices capable of storing and playing digital media such as audio, images, and video files.
 Digital media players can stream files from a personal computer and network-attached storage or from another networked media server to play back the media on a television or video projector display for home cinema.
 Most digital media players utilize a 10-foot user interface, and many are navigated via a remote control.
Home cinema, also called home theater or home theatre, refers to home entertainment audio-visual systems that seek to reproduce a movie theater experience and mood using consumer electronics-grade video and audio equipment that is set up in a room or backyard of a private home.
 In the 1980s, home cinemas typically consisted of a movie pre-recorded on a LaserDisc or VHS tape; a LaserDisc or VHS player; and a heavy, bulky large-screen cathode ray tube TV set.
 In the 2000s, technological innovations in sound systems, video player equipment and TV screens and video projectors have changed the equipment used in home theatre set-ups and enabled home users to experience a higher-resolution screen image, improved sound quality and components that offer users more options (e.g., many of the more expensive Blu-ray players in 2016 can also "stream" movies and TV shows over the Internet using subscription services such as Netflix).
 The development of Internet-based subscription services means that 2016-era home theatre users do not have to commute to a video rental store as was common in the 1980s and 1990s (nevertheless, some movie enthusiasts buy DVD or Blu-ray discs of their favourite content).
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 data is typically stored on a CD, DVD, flash memory, microdrive, or hard drive.
 Most portable media players are equipped with a 3.5 mm headphone jack, which users can plug headphones into, or connect to a boombox or hifi system.
 In contrast, analog portable audio players play music from non-digital media that use analog signal storage, such as cassette tapes or vinyl records.
Voxx International is an American consumer electronics company founded as Audiovox Corporation in 1965 and renamed Voxx in 2012.
 It is headquartered in Hauppauge, New York.
 The company specializes in four areas: OEM and after-market automotive electronics, consumer electronics accessories, and consumer and commercial audio equipment.
Consumer electronics or home electronics are electronic (analog or digital) equipments intended for everyday use, typically in private homes.
 Consumer electronics include devices used for entertainment (flatscreen TVs, DVD players, video games, remote control cars, etc.), communications (telephones, cell phones, e-mail-capable laptops, etc.), and home-office activities (e.g., desktop computers, printers, paper shredders, etc.).
 In British English, they are often called brown goods by producers and sellers, to distinguish them from "white goods" such as washing machines and refrigerators.
 In the 2010s, this distinction is not always present in large big box consumer electronics stores, such as Best Buy, which sell both entertainment, communications, and home office devices and kitchen appliances such as refrigerators.
 Consumer electronics stores differ from professional audio stores in that the former sells consumer-grade electronics for private use, whereas the latter sells professional-grade electronics designed for use by audio engineers and audio technicians.

Question: Astell&Kern, is a South Korean consumer electronics company founded in October 2013, and is wholly owned by Iriver, the company manufactures media players, CD players, headphones, and which type, that refers to home entertainment audio-visual systems that seek to reproduce a movie theater experience and mood using consumer electronics-grade video and audio equipment that is set up in a room or backyard of a private home?
Answer: home theater