input: Morbid Angel was formed in 1983 in Tampa, Florida by guitarist Trey Azagthoth and drummer/vocalist Mike Browning. The band made their debut in 1987 on the New Renaissance Records record label. They recorded their debut album, Abominations of Desolation, in 1986, but the band was unsatisfied with the final product and it remained unreleased until 1991, printing 10,000 copies. In the early stages of their career the band developed a reputation for "gruesome stage antics." In 1986, David Vincent joined the band, replacing Michael Manson and Sterling von Scarborough as vocalist and bassist respectively. Fellow Terrorizer drummer Pete Sandoval soon followed. Their first studio album, Altars of Madness, was released in 1989, and is regarded by many as one of the most important death metal albums of all time. It is also considered the first true death metal album. Music journalist Jason Birchmeier writes that: Few albums struck a chord within the ears and minds of the late-'80s underground metal scene like Morbid Angel's Altars of Madness did at the end of the decade, setting a new precedent for metal bands to reach. With the arguable exception of Chuck Schuldiner's Death, never before had a heavy metal band carried their lightning-fast guitar riffs and equally spellbinding guitar solos into such horrific territory. Venom and Slayer redefined the extent to which a metal band could align itself with all things evil during the beginning of the decade, but Morbid Angel made these two groups sound like children's music compared to the Florida-based group's assaulting death metal sounds and their blasphemous lyrics.

Answer this question "What was important about Altars of Madness?"
output: and is regarded by many as one of the most important death metal albums of all time.

input: Patti Page recorded several songs with Al Clauser & His Oklahoma Outlaws (1946), The Eddie Getz Orchestra, and the George Barnes Trio (1947). Page recorded her first hit single, "Confess", in 1947. Because of a strike, background singers were not available to provide harmony vocals for the song, so Page and the label decided to overdub the harmony parts. Bill Putnam, an engineer for Mercury Records, was able to overdub Page's voice, using the latest recording technology. Thus, Page became the first pop artist to harmonize her own vocals on a recording. This technique would later be used on Page's biggest hit singles in the 1950s. In 1948, "Confess" became a Top 15 hit on Billboard magazine, peaking at No. 12 on the "Best-Sellers" chart, becoming her first hit. Page followed the single with four more in 1948-1949, only one of which was a Top 20 hit, "So in Love" (1949). Page also had a Top 15 hit on the Billboard magazine country chart in 1949 with "Money, Marbles, and Chalk". In 1950, Page had her first million-selling single "With My Eyes Wide Open, I'm Dreaming", another song where she harmonized her vocals. Because she was overdubbing her vocals, Page's name had to be listed on the recording credits as a group. According to one early-1950s' chart, Page was credited as "The Patti Page Quartet." In mid-1950, Page's single, "All My Love (Bolero)" peaked at No. 1 on Billboard magazine, becoming her first No. 1 hit, spending five weeks there. That same year, she also had her first Top 10 hit with "I Don't Care if the Sun Don't Shine", as well as the Top 25 single, "Back in Your Own Backyard".

Answer this question "Did he have any other successful selling singles?"
output: In mid-1950, Page's single, "All My Love (Bolero)" peaked at No. 1 on Billboard magazine,

input: A rapid series of rhythmic and harmonic changes introduces a pseudo-operatic midsection, which contains the bulk of the elaborate vocal multi-tracking, depicting the narrator's descent into hell. While the underlying pulse of the song is maintained, the dynamics vary greatly from bar to bar, from only Mercury's voice accompanied by a piano to a multi-voice choir supported by drums, bass, piano and Timpani. The choir effect was created by having May, Mercury, and Taylor repeatedly sing their vocal parts, resulting in 180 separate overdubs. These overdubs were then combined into successive submixes. According to Roger Taylor, the voices of May, Mercury and himself combined created a wide vocal range: "Brian could get down quite low, Freddie had a powerful voice through the middle, and I was good at the high stuff." The band wanted to create "a wall of sound, that starts down and goes all the way up". The band used the bell effect for lyrics "Magnifico" and "Let me go". Also, on "Let him go", Taylor singing the top section carries his note on further after the rest of the "choir" have stopped singing. Lyrical references in this passage include Scaramouche, the fandango, Galileo Galilei, Figaro, Beelzebub and Bismillah, as rival factions fight over the narrator's soul. The section concludes with a full choral treatment of the lyric "Beelzebub has a devil put aside for me!", on a block B major chord. Roger Taylor tops the final chord with a falsetto B in the fifth octave (B5). Using the 24-track technology available at the time, the "opera" section took about three weeks to finish. Producer Roy Thomas Baker said "Every time Freddie came up with another 'Galileo', I would add another piece of tape to the reel." Baker recalls that they kept wearing out the tape, which meant having to do transfers.

Answer this question "Is there anything else I should know about the Opera part of the song?"
output:
Lyrical references in this passage include Scaramouche, the fandango, Galileo Galilei, Figaro, Beelzebub and Bismillah,