Mark B. Christensen
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Mark Christensen is an American audio engineer, known for mastering, producing, and mixing music in the genres of rock, pop, R&B, classical, and
hip hop Hip-hop or hip hop (originally disco rap) is a popular music genre that emerged in the early 1970s from the African-American community of New York City. The style is characterized by its synthesis of a wide range of musical techniques. Hip- ...
. He has been credited on two
Grammy Award The Grammy Awards, stylized as GRAMMY, and often referred to as The Grammys, are awards presented by The Recording Academy of the United States to recognize outstanding achievements in music. They are regarded by many as the most prestigious ...
-winning albums, as well as seven albums nominated for the award. Christensen is a voting member of
The Recording Academy National Academy of Recording Arts & Sciences, Inc. (NARAS), doing business as The Recording Academy, is an American Learned society, learned academy of musicians, producers, recording engineers, and other musical professionals. It is widely kno ...
and has served on the Producers and Engineers Committee of the New York Chapter. Christensen has also mastered over thirty ''Billboard'' chart top ten hits, and has contributed to 50 projects that have received
platinum Platinum is a chemical element; it has Symbol (chemistry), symbol Pt and atomic number 78. It is a density, dense, malleable, ductility, ductile, highly unreactive, precious metal, precious, silverish-white transition metal. Its name origina ...
or
gold Gold is a chemical element; it has chemical symbol Au (from Latin ) and atomic number 79. In its pure form, it is a brightness, bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal ...
certifications by the RIAA. He has mastered material by
Pop Smoke Bashar Barakah Jackson (July 20, 1999 – February 19, 2020), known professionally as Pop Smoke, was an American rapper. Born and raised in Brooklyn, New York City, he rose to fame with the release of his 2019 singles "Welcome to the Party (P ...
,
OK GO OK Go is an American Rock music, rock band originally from Chicago, Illinois, now based in Los Angeles, California. The band is composed of Damian Kulash (lead vocals, rhythm guitar, guitar), Tim Nordwind (bass guitar, bass, backing vocalist, v ...
,
The Killers The Killers are an American Rock music, rock band formed in Las Vegas, Nevada, in 2001 by Brandon Flowers (lead vocals, keyboards, bass) and Dave Keuning (lead guitar, backing vocals). After the band went through a number of short-term bas ...
,
Ice Spice Isis Naija Gaston (born January1, 2000), known professionally as Ice Spice, is an American rapper and songwriter. Born and raised in the Bronx, New York City, she began her musical career during college in 2020, after meeting record producer ...
,
SZA Solána Imani Rowe (born November 8, 1989), known professionally as SZA ( ), is an American singer-songwriter. Known for her diaristic lyrics and genre explorations, she has been credited as a prominent figure in influencing contemporary R& ...
,
98 Degrees 98 Degrees (stylized as 98°) is an American vocal group consisting of brothers Nick and Drew Lachey, Jeff Timmons, and Justin Jeffre. Their first Christmas album '' This Christmas'' has sold over two million copies and is widely recognized ...
,
Boyz II Men Boyz II Men ( ) is an American vocal harmony group from Philadelphia, Pennsylvania, best known for emotional ballads and a cappella harmonies. Formed in 1985, they have been a trio composed of baritone Nathan Morris, tenor Wanya Morris, Wanyá Mo ...
, Fergie,
Toni Braxton Toni Michele Braxton (born October 7, 1966) is an American singer, songwriter, actress and television personality. She has sold over 70 million records worldwide and is one of the best-selling female artists in history. Braxton has won seven ...
,
Talib Kweli Talib Kweli Greene (; born October 3, 1975) is an American rapper. He first earned recognition through his collaboration with fellow Brooklyn rapper Mos Def (now known as Yasiin Bey) in 1997, when they formed the group Black Star. Kweli's music ...
,
Trey Songz Tremaine Aldon Neverson (born November 28, 1984), known professionally as Trey Songz, is an American Contemporary R&B, R&B singer and songwriter. After being discovered by record producer Troy Taylor (record producer), Troy Taylor in 2003, Songz ...
,
50 Cent Curtis James Jackson III (born July 6, 1975), known professionally as 50 Cent, is an American rapper, actor, and television producer. Born in Queens, a borough of New York City, Jackson began pursuing a musical career in 1996. In 1999–2000, ...
,
Ryan Leslie Anthony Ryan Leslie (born September 25, 1978) is an American singer, songwriter, rapper, record producer, and entrepreneur. Working predominantly in contemporary R&B and hip hop, he has released six studio albums and written songs for artists ...
and
The Ting Tings The Ting Tings are an English indie pop duo formed in Salford, Greater Manchester, in 2007. The band consists of Katie White (vocals, guitar, bass drums, bass guitar, cowbells) and Jules De Martino (drums, lead guitar, bass guitar, keyboards, ...
, among others. Along with business partner Scott Lee, Christensen opened the New York Audio Academy, an audio engineering school hosted at Engine Room Audio to teach and mentor students on how to record, mix, master and produce records. Along with Scott Lee and
Charles Farrar Charles Farrar is an American songwriter, composer, and producer, best known for his songwriting work with vocal groups SWV, 702, Today, and Shades. In the late 1990s/early 2000s, Farrar, alongside Troy Taylor, was a member of "The Character ...
, he is one of the principals of Bond Street Artist Management.


Career


Early touring and production (1980s–1990s)

Mark B. Christensen was born in
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
, and raised in the United States and
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
. By the age of sixteen he was touring with his own
progressive rock Progressive rock (shortened as prog rock or simply prog) is a broad genre of rock music that primarily developed in the United Kingdom through the mid- to late 1960s, peaking in the early-to-mid-1970s. Initially termed " progressive pop", the ...
material in the
midwest The Midwestern United States (also referred to as the Midwest, the Heartland or the American Midwest) is one of the four census regions defined by the United States Census Bureau. It occupies the northern central part of the United States. It ...
. He began producing music at age nineteen, while also studying
audio engineering Audio most commonly refers to sound, as it is transmitted in signal form. It may also refer to: Sound *Audio signal, an electrical representation of sound * Audio frequency, a frequency in the audio spectrum *Digital audio, representation of soun ...
and mastering techniques. He spent three years living in London in the early 1990s, producing independent albums and touring with bands such as
The Waterboys The Waterboys are a rock band formed in 1983 by Scottish musician and songwriter Mike Scott (Scottish musician), Mike Scott. The band's membership, past and present, has been composed mainly of musicians from Britain and Ireland, with Scott re ...
and
The Clash The Clash were an English Rock music, rock band formed in London in 1976. Billed as "The Only Band That Matters", they are considered one of the most influential acts in the original wave of British punk rock, with their music fusing elements ...
. After returning to New York City Christensen began working at Soundtrack City as a
line producer A line producer is a type of film or television producer who is the head of the production office management personnel during daily operations of a feature film, advertisement film, television film, or TV program. They are responsible for human re ...
, and in 1995 he began playing with a number of New York bands. While at Soundtrack City, he signed another record deal based on a self-produced demo, and ended up working on tours for bands such as
Radiohead Radiohead are an English rock band formed in Abingdon-on-Thames, Abingdon, Oxfordshire, in 1985. The band members are Thom Yorke (vocals, guitar, piano, keyboards); brothers Jonny Greenwood (guitar, keyboards, other instruments) and Colin Gre ...
,
The Wallflowers The Wallflowers are an American rock music, rock solo project of American singer-songwriter and multi-instrumentalist Jakob Dylan. The Wallflowers were originally a roots rock band formed in Los Angeles by Dylan and guitarist Tobi Miller. It ha ...
and The Gin Blossoms. By the late 1990s he had played as a lead vocalist, guitarist, or songwriter for several bands in
Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
, London, and New York. Also in the 1990s he did session work as a singer, guitarist, and songwriter, singing backup on several projects by Kevin Salem of
Roadrunner Records Roadrunner Records is a Dutch–American record label focused on Heavy metal music, heavy metal and hard rock music. Founded in the Netherlands in 1980, it is now a division of Warner Music Group and is based in New York City. Formerly seen as ...
and co-writing material with
Ivan Neville Ivan Neville (born August 19, 1959) is an American multi-instrumentalist musician, singer, and songwriter. He is the son of Aaron Neville and nephew to the other members of The Neville Brothers. Career Neville has released four solo albums and ...
. Through Soundtrack City he also worked on the soundtracks for several commercials and films, including music videos for artists such as
The Rolling Stones The Rolling Stones are an English Rock music, rock band formed in London in 1962. Active for over six decades, they are one of the most popular, influential, and enduring bands of the Album era, rock era. In the early 1960s, the band pione ...
,
Cyndi Lauper Cynthia Ann Stephanie Lauper ( ; born June 22, 1953) is an American singer, songwriter and actress. Known for her distinctive image, featuring a variety of hair colors and eccentric clothing, and for her powerful four-octave vocal range;Jerome, ...
,
Duran Duran Duran Duran () are an English pop rock band formed in Birmingham in 1978 by singer Stephen Duffy, keyboardist Nick Rhodes and guitarist/bassist John Taylor (bass guitarist), John Taylor. After several early changes, the band's line-up settled ...
,
LL Cool J James Todd Smith (born January 14, 1968), known professionally as LL Cool J (short for Ladies Love Cool James), is an American rapper and actor. He is one of the earliest rappers to achieve commercial success, alongside fellow new school hip ho ...
, and
3rd Bass 3rd Bass is an American hip hop group that was most active in the late 1980s and early 1990s. Formed by MC Serch, Pete Nice, and DJ Richie Rich, the group was notable for being one of the first successful interracial hip hop acts. Along with ...
. In 1995 he took a partial hiatus from music. During this time he opened and operated a restaurant in Manhattan, returning to music once the restaurant was financially stable.


Founding Engine Room Audio (1996–2003)

In 1996 Christensen founded Engine Room Audio (ERA) in lower Manhattan, originally constructing the studio in his loft apartment to master and record local bands. He is studio owner and chief engineer, and in 2000 he designed the cover for an album by Sin Dizzy. In 2001 he engineered several choral albums through Engine Room Audio, and the following year he remastered the bonus tracks for
Linda Perhacs Linda Perhacs (born 21 September 1943) is an American psychedelic folk singer, who released her first album, '' Parallelograms'', in 1970 to scant notice or sales. The album was rediscovered by record enthusiasts and reissued numerous times begin ...
' '' Parallelograms''. As of 2002 Engine Room Audio has offered traditional mastering and duplication services, as well as engineering, mastering, recording, and in some cases production. Clients at the studio have since included
Lady Gaga Stefani Joanne Angelina Germanotta (born March 28, 1986), known professionally as Lady Gaga, is an American singer, songwriter, and actress. Known for her image reinventions and versatility across the entertainment industry, she is an influ ...
,
The Killers The Killers are an American Rock music, rock band formed in Las Vegas, Nevada, in 2001 by Brandon Flowers (lead vocals, keyboards, bass) and Dave Keuning (lead guitar, backing vocals). After the band went through a number of short-term bas ...
, and
The Ting Tings The Ting Tings are an English indie pop duo formed in Salford, Greater Manchester, in 2007. The band consists of Katie White (vocals, guitar, bass drums, bass guitar, cowbells) and Jules De Martino (drums, lead guitar, bass guitar, keyboards, ...
,
Kylie Minogue Kylie Ann Minogue (; born 28 May 1968) is an Australian singer, songwriter, and actress. Frequently referred to as the "Honorific nicknames in popular music, Princess of Pop", she has achieved recognition in both the music industry and fas ...
,
A$AP Rocky Rakim Athelaston Mayers (born October 3, 1988), known professionally as ASAP Rocky ( ; stylized as A$AP Rocky), is an American rapper. Born and raised in Harlem, he embarked on his musical career as a member of the hip hop collective ASAP Mo ...
, and
Toni Braxton Toni Michele Braxton (born October 7, 1966) is an American singer, songwriter, actress and television personality. She has sold over 70 million records worldwide and is one of the best-selling female artists in history. Braxton has won seven ...
, among others. Other mastering projects at ERA include an album by Tony Jarvis, a number of classical albums for Museovitch Productions, and several projects for Respect Music, an alternative dance label in Hong Kong.


Founding Engine Room Recordings (2004–08)

The independent record label
Engine Room Recordings Engine Room Recordings is an independent record label with a roster of indie rock and alternative rock musicians. Beyond marketing and distribution for its artists, the label does booking and artist management. Engine Room Recordings is part of th ...
was started by Christensen and Peter Block in 2005. In 2006 the label released its first record, ''Twisted Heart'' by
Goat The goat or domestic goat (''Capra hircus'') is a species of Caprinae, goat-antelope that is mostly kept as livestock. It was domesticated from the wild goat (''C. aegagrus'') of Southwest Asia and Eastern Europe. The goat is a member of the ...
, with Christensen mastering. The New York City-based band
Porter Block Porter Block is an American, New York-based power pop band, formed by Peter Block and Caleb Sherman. Since 2006, the band has released five albums and one EP, including several collaborations with Mike Viola. History Porter Block formed in the ...
soon joined the roster, with Christensen again mastering their debut album. Engine Room is also well known for producing the compilation series ''Guilt by Association''. ''
Guilt by Association Vol. 1 ''Guilt by Association Vol. 1'' is a compilation album released September 4, 2007 by Engine Room Recordings. It features indie rock artists covering well-known pop and R&B songs. Overview Conceived and compiled by Engine Room Recordings, the albu ...
'' (2007), ''
Guilt by Association Vol. 2 ''Guilt by Association Vol. 2'' is a compilation album released November 18, 2008 by Engine Room Recordings. Like its predecessor, ''Guilt by Association Vol. 1'', it features indie rock artists covering well-known pop and R&B songs. Overview Th ...
'' (2008) and ''
Guilt by Association Vol. 3 Guilt most commonly refers to: *Guilt (emotion), an emotion that occurs when a person feels that they have violated a moral standard *Culpability, a legal term *Guilt (law), a legal term Music * ''Guilt'' (album), a 2009 album by Mims * "Guilt" ( ...
'' (2011) feature various independent artists covering well-known pop, R&B and rock songs from the 1980s, 1990s, and 2000s, with Christensen mastering. The label released a compilation of
Weezer Weezer is an American rock band formed in Los Angeles, California, in 1992. Since 2001, the band has consisted of Rivers Cuomo (lead vocals, guitar, keyboards), Patrick Wilson (drums, backing vocals), Brian Bell (guitar, keyboards, backing ...
covers in 2012. In 2008 Engine Room Recordings signed
Brooklyn Brooklyn is a Boroughs of New York City, borough of New York City located at the westernmost end of Long Island in the New York (state), State of New York. Formerly an independent city, the borough is coextensive with Kings County, one of twelv ...
-based bands
Lowry Lowry may refer to: People * Adam Lowry (born 1993), American ice hockey player * Calvin Lowry (born 1983), American football player * Dave Lowry (born 1965), Canadian ice hockey player * Desiree Lowry (born 1972), Puerto Rican beauty pageant t ...
and The Bloodsugars. Christensen helped produce as well as master Lowry's debut album. 2009 saw the label sign U.S. Royalty, among other bands. While Christensen worked on many of Engine Room's releases at that time, he also continued to master material for artists on other labels such as
Babygrande Babygrande Records is an American independent record label based in New York City, founded by Chuck Wilson. Babygrande is distributed by The Orchard and represented by the Creative Artists Agency in Hollywood. History Babygrande Records was ...
. He has mastered a large number of singles and albums for
Trey Songz Tremaine Aldon Neverson (born November 28, 1984), known professionally as Trey Songz, is an American Contemporary R&B, R&B singer and songwriter. After being discovered by record producer Troy Taylor (record producer), Troy Taylor in 2003, Songz ...
on
Atlantic Records Atlantic Recording Corporation (simply known as Atlantic Records) is an American record label founded in October 1947 by Ahmet Ertegun and Herb Abramson. Over the course of its first two decades, starting from the release of its first recor ...
since 2008, with Christensen explaining that "I master a lot of different styles of music, but his records are especially fun to work on" because of the production values. Also in 2008 Christensen continued to play guitar as a session musician for labels such as Universal Australia. In 2009 he mastered albums such as ''
War Angel War Angel is a fictional character created by Brian Pulido for his new line of post-Chaos comics at Avatar Press. She exists in the same universe as the rest Pulido's new line including Lady Death and Unholy. Background War Angel is supposedly tho ...
'' and ''
Before I Self Destruct ''Before I Self Destruct'' is the fourth studio album by American rapper 50 Cent, released November 16, 2009, on Shady Records, Aftermath Entertainment, G-Unit Records, Interscope Records and Universal Music Group. The album is his final solo ...
'' by
50 Cent Curtis James Jackson III (born July 6, 1975), known professionally as 50 Cent, is an American rapper, actor, and television producer. Born in Queens, a borough of New York City, Jackson began pursuing a musical career in 1996. In 1999–2000, ...
.


Recent projects (2010–present)

In early 2012 Christensen mastered the first single off Trey Songz' album ''Chapter V,'' titled "
Heart Attack A myocardial infarction (MI), commonly known as a heart attack, occurs when Ischemia, blood flow decreases or stops in one of the coronary arteries of the heart, causing infarction (tissue death) to the heart muscle. The most common symptom ...
," which was produced by
Benny Blanco Benjamin Joseph Levin (born March 8, 1988), known professionally as Benny Blanco (stylized in all lowercase), is an American record producer and songwriter. He is the recipient of the 2013 Hal David Starlight Award from the Songwriters Hall ...
and
Rico Love Richard Preston Butler Jr. (born December 3, 1982), better known by his stage name Rico Love, is an American record producer, singer, songwriter, and rapper. He was born in New Orleans, Louisiana, but split his childhood between Milwaukee, Wisco ...
. Around that time he mastered a track for
Pauly D Paul Michael DelVecchio Jr. (born July 5, 1980), known as Pauly D and DJ Pauly D, is an American television personality and disc jockey, DJ. He is best known for being a cast member of MTV's reality show ''Jersey Shore (TV series), Jersey Shore' ...
on
G-Note Records G-Note Records is a subsidiary record label of 50 Cent's G-Unit Records. The label was formed in late 2010 for pop, dance and R&B artists. The offices for the label are in New York. Origins (2010) After the success of former G-Unit subsidiary ...
as well, and he worked with the Italian rap group
Club Dogo Club Dogo is an Italian rap group from Milan that consists of Gué Pequeno, Jake La Furia and the beatmaker Don Joe. The group grew out of the friendship between rappers Gué Pequeno (whose stage name was Lucky Luciano) and Dargen D'Amico in ...
in June 2012. Signed to
Universal Music Group Universal Music Group N.V. (often abbreviated as UMG and referred to as Universal Music Group or Universal Music) is a Netherlands, Dutch–United States, American multinational Music industry, music corporation under Law of the Netherlands, ...
, the group's members DJ Don Joe and engineer Andrea "db" Debernardi flew to New York to mix and master an album with Christensen. Their resulting single "Cattivi Esempi" reached No. 2 on the Italian music charts. Christensen's other mastering projects in 2012 included the alt-rock band Weep's album ''Alate'' and the Trey Songz album ''
Chapter V Chapter Five refers to a fifth Chapter (books), chapter in a book. Chapter Five, Chapter 5, or Chapter V may also refer to: Albums * ''Chapter 5: Letter'', a 2002 album by g.o.d. * ''Chapter V: Underrated'', a Syleena Johnson album, 2011 * Chapter ...
'', which reached No. 1 on the
Billboard 200 The ''Billboard'' 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by '' Billboard'' magazine to convey the popularity of an artist or groups of artists. Sometimes, a rec ...
chart. Also that September,
50 Cent Curtis James Jackson III (born July 6, 1975), known professionally as 50 Cent, is an American rapper, actor, and television producer. Born in Queens, a borough of New York City, Jackson began pursuing a musical career in 1996. In 1999–2000, ...
was in the studio with Christensen to master his single " New Day," which features
Dr. Dre Andre Romell Young (born February 18, 1965), known professionally as Dr. Dre, is an American rapper, record producer, record executive, and actor. He is the founder and CEO of Aftermath Entertainment and Beats Electronics, and co-founder of ...
and
Alicia Keys Alicia Augello Cook (born January 25, 1981), known professionally as Alicia Keys, is an American singer and songwriter. A classically trained pianist, Keys began composing songs at the age of 12 and was signed by Columbia Records at 15. After d ...
. The song was mixed by
Eminem Marshall Bruce Mathers III (born October 17, 1972), known professionally as Eminem, is an American rapper, songwriter, and record producer. Regarded as one of the greatest and most influential rappers of all time, he is credited with popula ...
before mastering. In 2013 Mark started working with the artist "
Mr Probz Dennis Princewell Stehr (born May 15, 1984), known professionally as Mr. Probz, is a Dutch record producer, singer and rapper. He became known for the songs "Drivin'", "Sukkel voor de liefde", "Nothing Really Matters (Mr. Probz song), Nothing Re ...
", initially on his album " The Treatment" and the single "
Waves United States Naval Reserve (Women's Reserve), better known as the WAVES (for Women Accepted for Volunteer Emergency Service), was the women's branch of the United States Naval Reserve during World War II. It was established on July 21, 1942, ...
" and new material including the single "
Nothing Really Matters "Nothing Really Matters" is a song by American singer Madonna for her seventh studio album, ''Ray of Light'' (1998). It was written by Madonna and Patrick Leonard, and was produced by the singer with William Orbit and Marius De Vries. The song ...
". On 27 April 2014, Waves debuted at number one on the UK Singles Chart after selling 127,000 copies in its first week. As of October 2014, it was the fourth-biggest selling single of 2014 in the UK, with sales of 758,000. The song also peaked at number one in Australia (currently 3× platinum), Austria (currently gold), Germany (currently 5× platinum), Italy (currently 3× platinum), Sweden (currently 5× platinum) and Switzerland (currently platinum). In the United States, the remix reached number one on the Billboard Dance/Mix Show Airplay chart for the issue dated 16 August 2014 and is currently Platinum. Engine Room Audio in 2014 continued to work on projects by both 50 Cent and Trey Songz, with Christensen mastering albums such as 50 Cent's ''
Animal Ambition ''Animal Ambition: An Untamed Desire to Win'', more commonly known as just ''Animal Ambition'', is the fifth studio album by American rapper 50 Cent. The project was released on June 3, 2014, by G-Unit Records and Caroline. All 11 tracks on the ...
''. Other recent mastering projects include '' Collide'' by
Boyz II Men Boyz II Men ( ) is an American vocal harmony group from Philadelphia, Pennsylvania, best known for emotional ballads and a cappella harmonies. Formed in 1985, they have been a trio composed of baritone Nathan Morris, tenor Wanya Morris, Wanyá Mo ...
and '' Game Changer'' by
Johnny Gill Johnny Gill Jr. (born May 22, 1966) is an American singer and songwriter. He is the sixth and final member of the R&B/ pop group New Edition and was also a member of the supergroup called LSG, with Gerald Levert and Keith Sweat. Gill has rel ...
. Christensen's associated projects had been nominated for five
Grammy Awards The Grammy Awards, stylized as GRAMMY, and often referred to as The Grammys, are awards presented by The Recording Academy of the United States to recognize outstanding achievements in music. They are regarded by many as the most prestigious a ...
as of 2015, winning two of them. At that point Christensen had also worked on over 24 ''Billboard'' chart top ten hits, and around 25 of the releases had gone
platinum Platinum is a chemical element; it has Symbol (chemistry), symbol Pt and atomic number 78. It is a density, dense, malleable, ductility, ductile, highly unreactive, precious metal, precious, silverish-white transition metal. Its name origina ...
or
gold Gold is a chemical element; it has chemical symbol Au (from Latin ) and atomic number 79. In its pure form, it is a brightness, bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal ...
. Christensen is an official "mentor" at Recording Connection, a New York-based school for music recording. He also periodically chairs and moderates audio engineering panels at
music industry The music industry are individuals and organizations that earn money by Songwriter, writing songs and musical compositions, creating and selling Sound recording and reproduction, recorded music and sheet music, presenting live music, concerts, ...
events.


Discography


Production credits


References


External links


Mark Christensen
at Engine Room Audio
Mark Christensen
on Twitter {{DEFAULTSORT:Christensen, Mark Living people American audio engineers Year of birth missing (living people)