Question: What was the professional name of the recorder of Live at the Carousel Ballroom?

full_context: Document 1: Live at Austin City Limits: Live at Austin City Limits is a DVD and CD released by Image Entertainment in 2003 and 2001, respectively. The set captures a live performance by singer Roy Orbison on August 5, 1982 from the PBS television show "Austin City Limits". Orbison was the first "legend" to appear on the weekly series, which, at the time, featured local Texas performers. It is said that Orbison's appearance on the show paved the way for other legends such as Ray Charles, Marty Robbins, and even Johnny Cash to appear on the series. Unfortunately, Orbison was recovering from recent triple bypass heart surgery and also had a head cold on the day so his voice was not as strong as it was usually.
Document 2: Road Trips Volume 2 Number 2: Road Trips Volume 2 Number 2 is two-CD live album by the American rock band the Grateful Dead. The sixth in their "Road Trips" series of albums, it was the first to contain a complete concert — the February 14, 1968 show at the Carousel Ballroom (later known as the Fillmore West) in San Francisco, California. Bonus material on Disc 1, as well as the bonus disc offered to early purchasers, comes from the Grateful Dead and Quicksilver Messenger Service "Tour of the Great Pacific Northwest", immediately precededing the Carousel Ballroom show. The album was released on March 21, 2009.
Document 3: Move Over!: Move Over! is an album by Janis Joplin released for Record Store Day 2011. The album contains unreleased, rare and alternate songs from all three of Joplin's backing bands, Big Brother and the Holding Company, Kozmic Blues Band and Full Tilt Boogie Band.
Document 4: Geoff Emerick: Geoffrey Emerick (born 1946) is an English recording studio audio engineer. He worked with The Beatles on their albums "Revolver", "Sgt. Pepper's Lonely Hearts Club Band", "The Beatles" and "Abbey Road".
Document 5: John Phillips (musician): John Edmund Andrew Phillips (August 30, 1935 – March 18, 2001) was an American singer, guitarist, songwriter, and promoter, most notably of the 1967 Monterey Pop Festival, a landmark event of the counterculture era and the Summer of Love. Known as Papa John, Phillips was a member and leader of the vocal group The Mamas & the Papas.
Document 6: Ken Kesey: Kenneth Elton "Ken" Kesey ( ; September 17, 1935 – November 10, 2001) was an American novelist, essayist, and countercultural figure. He considered himself a link between the Beat Generation of the 1950s and the hippies of the 1960s.
Document 7: Turn on, tune in, drop out: "Turn on, tune in, drop out" is a counterculture-era phrase popularized by Timothy Leary in 1966. In 1967 Leary spoke at the Human Be-In, a gathering of 30,000 hippies in Golden Gate Park in San Francisco and phrased the famous words, "Turn on, tune in, drop out". It was also the title of his spoken word album "Turn On, Tune In, Drop Out" recorded in 1966. On this lengthy album one can hear Leary speaking in a monotone, soft-spoken voice on his views about the world and humanity and describing nature, Indian symbols, "the meaning of inner life", the LSD experience, peace and many other issues.
Document 8: Phil Spector: Phillip Harvey Spector (born Harvey Phillip Spector, December 26, 1939) is an American record producer, musician, and songwriter who developed the Wall of Sound, a music production formula he described as a "Wagnerian" approach to rock and roll. Spector is considered the first auteur among musical artists for acting not only as a producer, but also the creative director, writing or choosing the material, and masterminding all phases of the recording process. Additionally, Spector helped engender the idea of the studio as its own distinct instrument. For these contributions, he is acknowledged as one of the most influential figures in pop music history. Later in his life, Spector became notorious for his solitary lifestyle and eccentric personality, which was brought to wider notice during the media coverage surrounding his trials and conviction for murder in the 2000s.
Document 9: Grateful Dead Download Series Volume 6: Volume 6 is the sixth in a series of live digital downloads of the band the Grateful Dead released by The Grateful Dead Productions. It was released on October 4, 2005 and is a single disc featuring some of the band performing on March 17, 1968 at the Carousel Ballroom (which later became the Fillmore West) in San Francisco, CA. The show features the first set closer "Turn On Your Lovelight" and the whole second set.
Document 10: Live at the Palace: Live at the Palace is a live album recorded at The Palace in Hollywood on October 11, 1995 by the band Blind Melon. It is the fourth posthumous album featuring vocals from former Blind Melon frontman Shannon Hoon, recorded ten days before Hoon's passing.
Document 11: Robert Moog: Robert Arthur "Bob" Moog ( ; May 23, 1934 – August 21, 2005), founder of Moog Music, was an American engineer and pioneer of electronic music, best known as the inventor of the Moog synthesizer.
Document 12: Bob Bralove: Bob Bralove is an auxiliary keyboard–synthesizer player who worked as a sound technician with Grateful Dead from 1986 to 1995. He was influential on their integration of MIDI technology, first working with drummers Mickey Hart and Bill Kreutzmann, keyboardist Brent Mydland, and later guitarist Bob Weir and synthesizer/piano player Vince Welnick. He also co-wrote and contributed to such songs as "Picasso Moon", "Way to Go Home", "Easy Answers". Perhaps his biggest project with the band was assembling segments of Dead jams on the 1991 "Infrared Roses" compilation album. "Parallelogram", "Little Nemo in Nightland" are some of his most notable "compositions" from this release.
Document 13: Janis Joplin: Janis Lyn Joplin ( ; January 19, 1943 – October 4, 1970) was an American rock singer and songwriter. She was one of the biggest female rock stars of her era. After releasing three albums, she died of a heroin overdose at age 27. A fourth album, "Pearl", was released in January 1971, just over three months after her death. It reached number one on the "Billboard" charts.
Document 14: Owsley Stanley: Owsley Stanley (born Augustus Owsley Stanley III, January 19, 1935 – March 12, 2011) was an American audio engineer and clandestine chemist. He was a key figure in the San Francisco Bay Area hippie movement during the 1960s and played a pivotal role in the counterculture of the 1960s. Under the professional name Bear, he was the soundman for the rock band the Grateful Dead, whom he met when Ken Kesey invited them to an Acid Test party. As their sound engineer, Stanley frequently recorded live tapes behind his mixing board, designed their trademark skull logo, and developed their Wall of Sound sound system, one of the largest mobile public address systems ever constructed.
Document 15: Live at the Carousel Ballroom 1968: Live at the Carousel Ballroom 1968 is a live album by Big Brother and the Holding Company featuring Janis Joplin. The album was recorded by Owsley Stanley in 1968, and released on March 12, 2012, on the one-year anniversary of his death in an automobile accident. He had previously been supervising the development and release of this album right up to the time of his death on March 12, 2011. The album is dedicated to him, and set to the specifications Stanley set prior to his death.
ground_truth: Bear