Problem: Saosin is an American post-hardcore band from Orange County, California, United States. The band was formed in 2003 and recorded its first EP, Translating the Name, that same year original vocalist Anthony Green left Saosin due to personal reasons. In 2004, Cove Reber replaced Green as vocalist after auditioning for the role. The group recorded its self titled debut album which was released on Capitol Records on September 26, 2006.

After the audition process and several guest vocalists on demos, the then 19-year-old Cove Reber was announced as their new permanent lead singer. Reber had sent in his demo tape, which was an acoustic demo with "Mookie's Last Christmas". The demo has since leaked onto the internet. It is widely speculated to have included a few songs from Translating the Name. When Beau Burchell first heard the demo, he thought it was Anthony playing a trick on them, as Reber's vocal stylings were very similar to those of Green's when the demo was originally recorded. In an interview with PlayPro.com, Reber commented that "everyone I've played with wants to make music their lives...Saosin is a band on a completely different level. All these dudes are freaks about music." Reber's addition to the band was difficult, for the more experienced Green was the center piece of the band in the eyes of Saosin's fans. Many fans consider the time with Green to be something entirely different from the time with Reber. There are still distinct fans of both eras (Green Era/Reber Era) debating on which is a better fit for the band as a whole. Saosin played the Taste of Chaos tour the following winter. Saosin was signed to Capitol Records in March and toured the United States with the Warped Tour for the second time. That summer, they released the Saosin EP. At first it was intended to be a free sampler, but Capitol Records would not allow this and released it as an EP. It contained demo versions of songs later recorded on their first full-length album. A video to their new single "Bury Your Head" was filmed during the tour. The band continued touring for the rest of 2005, opening for Avenged Sevenfold and Coheed and Cambria.

Were any of the demos with guest vocalist released?

Answer with quotes:

Problem: (Franz) Joseph Haydn (; German: ['jo:zef 'haId@n] ( listen); 31 March 1732 - 31 May 1809) was an Austrian composer of the Classical period. He was instrumental in the development of chamber music such as the piano trio and his contributions to musical form have earned him the epithets "Father of the Symphony" and "Father of the String Quartet".

Haydn returned to Vienna in 1795. Prince Anton had died, and his successor Nikolaus II proposed that the Esterhazy musical establishment be revived with Haydn serving again as Kapellmeister. Haydn took up the position on a part-time basis. He spent his summers with the Esterhazys in Eisenstadt, and over the course of several years wrote six masses for them. By this time Haydn had become a public figure in Vienna. He spent most of his time in his home, a large house in the suburb of Windmuhle, and wrote works for public performance. In collaboration with his librettist and mentor Gottfried van Swieten, and with funding from van Swieten's Gesellschaft der Associierten, he composed his two great oratorios, The Creation (1798) and The Seasons (1801). Both were enthusiastically received. Haydn frequently appeared before the public, often leading performances of The Creation and The Seasons for charity benefits, including Tonkunstler-Societat programs with massed musical forces. He also composed instrumental music: the popular Trumpet Concerto, and the last nine in his long series of string quartets, including the Fifths, Emperor, and Sunrise. A brief work, "Gott erhalte Franz den Kaiser" (the "Emperor's Hymn"; 1797), achieved great success and became "the enduring emblem of Austrian identity right up to the First World War" (Jones); in modern times it became (with different words) the national anthem of Germany. During the later years of this successful period, Haydn faced incipient old age and fluctuating health, and he had to struggle to complete his final works. His last major work, from 1802, was the sixth mass for the Esterhazys, the Harmoniemesse.

Did he compose anything during this time?

Answer with quotes:
he composed his two great oratorios, The Creation (1798) and The Seasons (1801).